Sony WIC400/L Help Manual
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Sony WIC400/L Help Manual

Wireless stereo headset
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Help Guide
Wireless Stereo Headset
WI-C400
Use this manual if you encounter any problems, or have any questions.
This Help Guide is also available as a PDF, which can be downloaded here.
Getting started
What you can do with the BLUETOOTH function
About voice guidance
Supplied accessories
Checking the package contents
Replacing the earbuds
Adjusting the cable length
Parts and controls
Location and function of parts
About the indicator
Power/Charging
Charging the headset
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Summary of Contents for Sony WIC400/L

  • Page 1 Help Guide Wireless Stereo Headset WI-C400 Use this manual if you encounter any problems, or have any questions. This Help Guide is also available as a PDF, which can be downloaded here. Getting started What you can do with the BLUETOOTH function About voice guidance Supplied accessories Checking the package contents...
  • Page 2 Available operating time Checking the remaining battery charge System requirements for battery charge using USB Turning on the headset Turning off the headset Making connections How to make a wireless connection to BLUETOOTH devices One-touch connection (NFC) compatible Android devices One-touch connection (NFC) with a smartphone (Android 4.1 or later) Disconnecting the smartphone by one touch (NFC) Switching the device by one touch (NFC)
  • Page 3 Listening to music from a device via BLUETOOTH connection Controlling the audio device (BLUETOOTH connection) Disconnecting BLUETOOTH connection (after use) Supported codecs Making phone calls Receiving a call Making a call Functions for a phone call Disconnecting BLUETOOTH connection (after use) Using the voice assist function Using the voice assist function (Google App) Using the voice assist function (Siri)
  • Page 4 The BLUETOOTH wireless communication range is short, or the sound skips. The headset does not operate properly. No voice from callers Low voice from callers Resetting or initializing the headset Resetting the headset Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 5: What You Can Do With The Bluetooth Function

    You can receive audio signals from a smartphone or music player to enjoy music wirelessly. Talking on the phone You can make and receive a call with your hands free, while leaving your smartphone or mobile phone in your bag or pocket. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 6: About Voice Guidance

    When automatically turning off due to the low battery condition: “Please recharge headset” When turning on the vibration function for receiving a call : “Vibration on” When turning off the vibration function for receiving a call : “Vibration off” 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 7: Checking The Package Contents

    Hybrid silicone rubber earbuds (SS/S/M/L 2 each) Size M earbuds come attached to the headset. Reference Guide (1) Operating Instructions (1) Other documents (1 set) (*) May not be supplied in some countries or regions. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 8: Replacing The Earbuds

    C: M size (three lines) D: L size (four lines) Remove the earbuds. Do not pinch the end of the earbud when removing it. Attach the earbuds. Do not attach the earbuds loose or skewed. 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 9 Slide the cable adjuster to fit the headset to your head. You can put the right and left units on the headset body when you do not use the headset. Put the stopper into a hole to fix the units. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 10: Location And Function Of Parts

    Help Guide Wireless Stereo Headset WI-C400 Location and function of parts left unit Earbuds right unit Stopper R mark Cable adjuster You can adjust the cable length by using this adjuster to fix the cable. N-mark Tactile dot The left unit has a tactile dot. L mark Built-in antenna A BLUETOOTH antenna is built into the headset.
  • Page 11 Connect a computer to this port with the supplied micro-USB cable to charge the headset. Microphone Picks up the sound of your voice when talking on the phone. Related Topic About the indicator Checking the remaining battery charge 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 12: About The Indicator

    Help Guide Wireless Stereo Headset WI-C400 About the indicator You can check various statuses of the headset by the indicators. : Turns on in blue/ : Turns on in red/-: Turns off Turning on (flashes two times) Turning off (lights for about two seconds) BLUETOOTH status indication Pairing mode Not connected...
  • Page 13 For details, refer to “Initializing the headset to restore factory settings.” Hint When the remaining battery charge becomes low, the indicator turns from blue to red, except for pairing mode. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 14: Charging The Headset

    Help Guide Wireless Stereo Headset WI-C400 Charging the headset The headset contains a lithium ion rechargeable battery. Charge the headset using the supplied micro-USB cable. Open the micro-USB port cover. Connect the supplied micro-USB cable to the headset, and then connect the other end to a booted computer.
  • Page 15 In this case, do not disconnect the micro-USB cable from the headset: wait a few minutes until the indicator (red) lights up. If the life of the built-in rechargeable battery drops significantly, the battery should be replaced. Consult your nearest Sony dealer for replacement of the rechargeable battery.

  • Page 16: Available Operating Time

    About 60 minutes of music playback is possible after 15 minutes charging. Communication time: Max. 20 hours Standby time: Max. 200 hours Note Usage hours may be different depending on the settings and conditions of use. Related Topic Supported codecs 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 17: Checking The Remaining Battery Charge

    Help Guide Wireless Stereo Headset WI-C400 Checking the remaining battery charge You can check the remaining battery charge of the rechargeable battery. When you turn on the headset or press the button while the headset is on, the indicator (blue) flashes two times, then the indicator (red) flashes.
  • Page 18 B: 100% to 70% C: 70% to 50% D: 50% to 20% E: 20% or lower (needs to charge) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 19: System Requirements For Battery Charge Using Usb

    Windows® 7 Home Basic / Home Premium / Professional / Ultimate When using Mac Mac OS X (version 10.9 or later) Note Sony does not guarantee proper operation in all system environments. When using Windows 8.1 update using Windows Update. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 20: Turning On The Headset

    Help Guide Wireless Stereo Headset WI-C400 Turning on the headset Press and hold the button for about 2 seconds until the indicator (blue) flashes. Related Topic Turning off the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 21: Turning Off The Headset

    Help Guide Wireless Stereo Headset WI-C400 Turning off the headset Press and hold the button for about 2 seconds until the indicator (blue) turns off. Related Topic Turning on the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 22: How To Make A Wireless Connection To Bluetooth Devices

    If the device supports one-touch connection (NFC), you can just touch to perform device registration (pairing) and establish a BLUETOOTH connection. Connecting the headset to a registered (paired) device When the device is registered, it is not necessary to register it again. Connect to it with an appropriate method. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 23: One-Touch Connection (Nfc) With A Smartphone (Android 4.1 Or Later)

    Help Guide Wireless Stereo Headset WI-C400 One-touch connection (NFC) with a smartphone (Android 4.1 or later) By touching the headset with a smartphone, the headset turns on automatically and then pairs and makes a BLUETOOTH connection. Compatible smartphones NFC-compatible smartphones installed with Android™ 4.1 or later NFC (Near Field Communication) is a technology enabling short-range wireless communication between various devices, such as smartphones and IC tags.
  • Page 24 (One-touch connection switching). Related Topic How to make a wireless connection to BLUETOOTH devices Disconnecting the smartphone by one touch (NFC) Switching the device by one touch (NFC) Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 25: Disconnecting The Smartphone By One Touch (Nfc)

    After the headset is disconnected from the smartphone, if no operation is performed for about 5 minutes, the headset turns off automatically. To turn off the headset before that, press and hold the button for about 2 seconds. You hear voice guidance “Power off”, the indicator (blue) goes off, then the headset turns off. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 26: Switching The Device By One Touch (Nfc)

    When the headset is connected with an NFC-compatible smartphone, if you touch the smartphone on another NFC- compatible BLUETOOTH headset or BLUETOOTH speaker, the smartphone disconnects from the headset, and connects to the BLUETOOTH device it touched. Note Unlock the screen of the smartphone if it is locked. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 27: Pairing And Connecting With An Android Smartphone

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with an Android smartphone Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The smartphone is placed within 1 m(3 feet) of the headset.
  • Page 28 Touch [WI-C400]. If passkey (*) input is required on the display of the smartphone, input “0000.” The headset and the smartphone are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired Android smartphone.”...
  • Page 29 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 30: Connecting To A Paired Android Smartphone

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired Android smartphone Unlock the screen of the Android smartphone if it is locked. Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”.
  • Page 31 In case that the pairing information for the headset has been deleted on the smartphone, the headset may go into pairing mode when turning on the headset. Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with an Android smartphone Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 32: Pairing And Connecting With An Iphone

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with an iPhone Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The iPhone is placed within 1 m(3 feet) of the headset.
  • Page 33 Touch [ ] to change it to [ ] (turn on the BLUETOOTH function). Touch [WI-C400]. If passkey (*) input is required on the display of the iPhone, input “0000.” The headset and the iPhone are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”.
  • Page 34 Listening to music from a device via BLUETOOTH connection Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 35: Connecting To A Paired Iphone

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired iPhone Unlock the screen of the iPhone if it is locked. Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”.
  • Page 36 In case that the pairing information for the headset has been deleted on the iPhone, the headset may go into pairing mode when turning on the headset. Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with an iPhone Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 37: Pairing And Connecting With A Computer (Windows 10)

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 10) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP).
  • Page 38 Click the [Bluetooth] tab, then click the [Bluetooth] button to turn on the BLUETOOTH function. Select [WI-C400], then click [Pair]. If passkey (*) input is required on the display of the computer, input “0000.”...
  • Page 39 How to make a wireless connection to BLUETOOTH devices Connecting to a paired computer (Windows 10) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 40: Pairing And Connecting With A Computer (Windows 8/Windows 8.1)

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 8/Windows 8.1) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP).
  • Page 41 Select [Change PC settings] of the [Settings] charm. Select [Devices] of [PC settings]. Select [Add a device]. Select [WI-C400]. If passkey (*) input is required on the display of the computer, input “0000.” The headset and the computer are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”.
  • Page 42 How to make a wireless connection to BLUETOOTH devices Connecting to a paired computer (Windows 8/Windows 8.1) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 43: Pairing And Connecting With A Computer (Windows 7)

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with a computer (Windows 7) Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: Your computer has a BLUETOOTH function that supports music playback connections (A2DP).
  • Page 44 Select [WI-C400], then click [Next]. If passkey (*) input is required on the display of the computer, input “0000.” The headset and the computer are paired with each other and connected. You hear voice guidance “BLUETOOTH connected”. If they are not connected, see “Connecting to a paired computer (Windows 7).”...
  • Page 45 How to make a wireless connection to BLUETOOTH devices Connecting to a paired computer (Windows 7) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 46: Connecting To A Paired Computer (Windows 10)

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 10) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer.
  • Page 47 If [WI-C400] is not displayed, right-click on the [Sound] screen, then select [Show Disabled Devices]. Click [Connect]. The connection is established. Hint...
  • Page 48 Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with a computer (Windows 10) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 49: Connecting To A Paired Computer (Windows 8/Windows 8.1)

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 8/Windows 8.1) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer.
  • Page 50 Select [Control Panel] in the [Settings] charm. Select [Hardware and Sound], then [Devices and Printers]. Right-click [WI-C400] in the [Devices and Printers] screen.
  • Page 51 Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with a computer (Windows 8/Windows 8.1) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 52: Connecting To A Paired Computer (Windows 7)

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired computer (Windows 7) Before starting the operation, make sure the following: Depending on the computer, the built-in BLUETOOTH adaptor should be turned on. For whether or not a BLUETOOTH adaptor is incorporate, and for how to turn it on, refer to the operating instructions supplied with the computer.
  • Page 53 Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with a computer (Windows 7) Listening to music from a device via BLUETOOTH connection Disconnecting BLUETOOTH connection (after use) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 55: Pairing And Connecting With Other Bluetooth Devices

    Help Guide Wireless Stereo Headset WI-C400 Pairing and connecting with other BLUETOOTH devices Pairing is the process required to create a link between BLUETOOTH devices to allow wireless connection. You must pair a device with the headset to be able to make a BLUETOOTH connection for the first time. Before you start pairing operation, make sure that: The BLUETOOTH device is placed within 1 m(3 feet) of the headset.
  • Page 56 The headset can be paired with multiple devices, but can only play music from one paired device at a time. Related Topic How to make a wireless connection to BLUETOOTH devices Connecting to a paired BLUETOOTH device Listening to music from a device via BLUETOOTH connection Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 57: Connecting To A Paired Bluetooth Device

    Help Guide Wireless Stereo Headset WI-C400 Connecting to a paired BLUETOOTH device Turn on the headset. Press and hold the button for about 2 seconds. Make sure that the indicator (blue) flashes after you release the button. You hear voice guidance “Power on”. After the headset turns on, if it has automatically connected to the last connected device, you hear voice guidance “BLUETOOTH connected”.
  • Page 58 Related Topic How to make a wireless connection to BLUETOOTH devices Pairing and connecting with other BLUETOOTH devices Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 59 You hear voice guidance “Power off”. Hint When you finish playing music, the BLUETOOTH connection may terminate automatically, depending on the BLUETOOTH device. Related Topic Disconnecting the smartphone by one touch (NFC) Turning off the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 60 Help Guide Wireless Stereo Headset WI-C400 Listening to music from a device via BLUETOOTH connection You can enjoy listening to music and basic remote control operation of a BLUETOOTH device via a BLUETOOTH connection. The BLUETOOTH device is required to support the following BLUETOOTH profiles. A2DP (Advanced Audio Distribution Profile): enables you to enjoy high-quality audio content wirelessly.
  • Page 61 If the communication condition is poor, the BLUETOOTH device may react incorrectly to the operation on the headset. Related Topic How to make a wireless connection to BLUETOOTH devices Controlling the audio device (BLUETOOTH connection) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 62: Controlling The Audio Device (Bluetooth Connection)

    If the communication condition is poor, the BLUETOOTH device may react incorrectly to the operation on the headset. The available functions may vary depending on the BLUETOOTH device. When you operate as illustrated above, it may operate differently or may not work at all. 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 63 You hear voice guidance “Power off”. Hint When you finish playing music, the BLUETOOTH connection may terminate automatically, depending on the BLUETOOTH device. Related Topic Disconnecting the smartphone by one touch (NFC) Turning off the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 64: Supported Codecs

    This is the standard audio coding technology used by BLUETOOTH devices. All BLUETOOTH devices support SBC. This is an abbreviation for Advanced Audio Coding. AAC is mainly used by Apple products such as iPhones, and it provides higher sound quality than that of SBC. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 65: Receiving A Call

    Help Guide Wireless Stereo Headset WI-C400 Receiving a call You can enjoy a hands-free call with a smartphone or mobile phone that supports the BLUETOOTH profile HFP (Hands- free Profile) or HSP (Headset Profile), via a BLUETOOTH connection. If your smartphone or mobile phone supports both HFP and HSP, set it to HFP. Operations may vary depending on the smartphone or mobile phone.
  • Page 66 - this is not a malfunction. Related Topic About voice guidance How to make a wireless connection to BLUETOOTH devices Making a call Functions for a phone call 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 67: Making A Call

    Help Guide Wireless Stereo Headset WI-C400 Making a call You can enjoy a hands-free call with a smartphone or mobile phone that supports the BLUETOOTH profile HFP (Hands- free Profile) or HSP (Headset Profile), via a BLUETOOTH connection. If your smartphone or mobile phone supports both HFP and HSP, set it to HFP. Operations may vary depending on the smartphone or mobile phone.
  • Page 68 Related Topic How to make a wireless connection to BLUETOOTH devices Receiving a call Functions for a phone call 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 69: Functions For A Phone Call

    Incoming call Press the button once to answer a call. During call Press the button once to finish a call. (*) Some devices may not support this function. Related Topic Receiving a call Making a call 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 71 You hear voice guidance “Power off”. Hint When you finish playing music, the BLUETOOTH connection may terminate automatically, depending on the BLUETOOTH device. Related Topic Disconnecting the smartphone by one touch (NFC) Turning off the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 72 Your voice is heard from the headset through the headset's microphone (Sidetone function). In this case, the surround sound or sound of the headset operation may be heard through the headset - this is not a malfunction. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 73: Using The Voice Assist Function (Siri)

    Your voice is heard from the headset through the headset's microphone (Sidetone function). In this case, the surround sound or sound of the headset operation may be heard through the headset - this is not a malfunction. 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 74 Help Guide Wireless Stereo Headset WI-C400 Precautions On BLUETOOTH communications BLUETOOTH wireless technology operates within a range of about 10 m (30 feet). Maximum communication range may vary depending on obstacles (human body, metal, wall, etc.) or electromagnetic environment. Microwaves emitting from a BLUETOOTH device may affect the operation of electronic medical devices. Turn off this headset and other BLUETOOTH devices in the following locations, as it may cause an accident: where inflammable gas is present, in a hospital, or a petrol station near automatic doors or a fire alarm.
  • Page 75 If you experience discomfort after using the BLUETOOTH device, stop using the BLUETOOTH device immediately. Should any problem persist, consult your nearest Sony dealer. Install the earbuds firmly. If an earbud accidentally detaches and is left in your ear, it may cause injury.
  • Page 76 The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Sony Corporation is under license. The N-Mark is a trademark or registered trademark of NFC Forum, Inc. in the United States and in other countries.

  • Page 77: Customer Support Websites

    Please access the following support website to get the support information about your headset: For customers in the U.S.A: http://esupport.sony.com/ For customers in Canada: http://esupport.sony.com/CA/ For customers in Latin America: http://esupport.sony.com/LA/ For customers in European countries: www.sony.eu/support For customers in China: https://service.sony.com.cn/ For customers in other countries/regions: http://www.sony-asia.com/ 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 78: What Can I Do To Solve A Problem

    Initialize the headset. This operation resets volume settings, etc., and deletes all pairing information. Look up information on the issue on the customer support website. If the operations above do not work, consult your nearest Sony dealer. Related Topic Charging the headset...

  • Page 79: The Headset Is Not Turned On

    Charge the battery of the headset. The headset cannot be turned on while charging the battery. Remove the micro-USB cable from the headset, and then turn on the headset again. Related Topic Charging the headset Checking the remaining battery charge 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 80: Charging Cannot Be Done

    Check that the micro-USB cable is connected to the headset and the computer firmly. Check that the computer is turned on. Check that the computer is not in standby, sleep or hibernation mode. When using Windows 8.1, update using Windows Update. Related Topic Charging the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 81: Charging Time Is Too Long

    Help Guide Wireless Stereo Headset WI-C400 Charging time is too long. Check that the headset and the computer are directly connected, not via a USB hub. Related Topic Charging the headset 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 82 The remaining battery charge is shown only on the screen of an iPhone or iPod touch (iOS 5.0 or later) that supports HFP (Hands-free Profile). Make sure that the iPhone or iPod touch is connected with HFP (Hands-free Profile). Otherwise, the remaining battery charge will not be displayed correctly. Related Topic Checking the remaining battery charge 4-698-107-11(2) Copyright 2017 Sony Corporation...
  • Page 83 If you are connecting a computer to the headset, make sure the audio output setting of the computer is set for a BLUETOOTH device. Pair the headset and the BLUETOOTH device again. Related Topic How to make a wireless connection to BLUETOOTH devices Listening to music from a device via BLUETOOTH connection 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 84: Low Sound Level

    Help Guide Wireless Stereo Headset WI-C400 Low sound level Turn up the volume of the headset and the connected device. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 85: Low Sound Quality

    If the sound quality does not improve after a few seconds, press the button on the headset once during playback. Or, operate the computer to make an A2DP connection. Refer to the operating instructions supplied with your computer for computer operation. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 86: Sound Skips Frequently During Playback

    Install this headset and the BLUETOOTH device as near to each other as possible. In case that you enjoy music with your smartphone, the situation may be improved by shutting down unnecessary apps or restarting your smartphone. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 87: Pairing Cannot Be Done

    Related Topic About the indicator How to make a wireless connection to BLUETOOTH devices Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 88: Unable To Connect The Headset To A Bluetooth Device With One-Touch Connection (Nfc)

    You cannot make a one-touch connection (NFC) while charging the battery because the headset cannot be turned on. Finish charging first, and then make the one-touch connection (NFC). Related Topic One-touch connection (NFC) with a smartphone (Android 4.1 or later) 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 89: Unable To Make A Bluetooth Connection

    In case that the pairing information for the headset has been deleted on the connected device, pair the headset with the device again. Related Topic About the indicator How to make a wireless connection to BLUETOOTH devices 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 90: Distorted Sound

    Help Guide Wireless Stereo Headset WI-C400 Distorted sound Keep the headset away from a microwave oven, Wi-Fi device, etc. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 91: The Bluetooth Wireless Communication Range Is Short, Or The Sound Skips

    Install this headset and the BLUETOOTH device as near to each other as possible. In case that you enjoy music with your smartphone, the situation may be improved by shutting down unnecessary apps or restarting your smartphone. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 92: The Headset Does Not Operate Properly

    Reset the headset. Pairing information is not deleted by this operation. If you cannot use the headset even after resetting it, initialize the headset. Related Topic Resetting the headset Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 93: No Voice From Callers

    If you are listening to music using the headset, stop playback, press the button on the headset and talk. Related Topic How to make a wireless connection to BLUETOOTH devices Receiving a call Making a call 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 94: Low Voice From Callers

    Help Guide Wireless Stereo Headset WI-C400 Low voice from callers Turn up the volume of the headset and the connected device. 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 95: Resetting The Headset

    Pairing information and other settings are not deleted by this operation. If the headset does not operate correctly even after resetting, initialize the headset to restore factory settings. Related Topic Initializing the headset to restore factory settings 4-698-107-11(2) Copyright 2017 Sony Corporation...

  • Page 96: Initializing The Headset To Restore Factory Settings

    All pairing information is deleted. In this case, delete the pairing information for the headset on the device which has been connected, then pair the headset with the device again. If the headset does not operate correctly even after initializing, consult your nearest Sony dealer. 4-698-107-11(2) Copyright 2017 Sony Corporation...

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