Sennheiser M2 IEBT SW - In-Ear Wireless Manual

The M2 IEBT SW In-Ear Wireless headphones

The M2 IEBT SW In-Ear Wireless headphones delivers uncompromised style, sound performance and take-anywhere mobility. The high-quality design of the headphones isn't complete without the exceptional wireless sound assured by Bluetooth 4.2 and Qualcomm® aptX™ or AAC audio codec.

Features

• Custom-machined, stainless-steel, in-ear sound tunnels for superior acoustic precision
• Supports Qualcomm® aptX™ for true Hi-Fi sound
• Supports AAC (Advanced Audio Coding) for greater sound quality and transparency
• 6 hour battery life with 1.5 hour charging

	Bluetooth The M2 I EBT S W In-Ear Wireless headphones comply with the Bluetooth 4.2 standard and are compatible with all Bluetooth 1.1, 1.2, 2.0, 2.1, 3.0, 4.0 and 4.1 devices with the following profiles: Hands Free Profile (HFP), Advanced Audio Distribution Profile (A2DP), and Audio/Video Remote Control Profile (AVRCP).
	aptX TM With AAC or aptX TM audio coding, you can be assured of crisp, pure and full stereo sound. It allows you to not only hear, but experience and feel the audio as it was intended. Utilizing aptX TM, Bluetooth technology can now offer wireless audio quality that is indistinguishable from the highest quality wired connection.
	aptX TM LL Qualcomm® aptX™ LL (Low Latency) audio ensures your Bluetooth® wireless enabled device can deliver sound in sync with visual media. It reduces delay and improves end-to-end speed of the audio transmission, resulting in a high quality, synchronized user experience. With aptX Low Latency you can enjoy the freedom of wireless for applications such as gaming and watching videos.

Package includes

	Headphones
	Carry case
	Ear adapters
	USB cable for charging
	Quick guide
	Safety guide

A list of accessories can be found at www.sennheiser.com. For information on suppliers, contact your local Sennheiser partner: www.sennheiser.com > "Sales Partner".

Product overview

Overview of the headphones

1. Ear adapters
2. Bluetooth antenna (not visible)
3. Cable organizer
4. Volume/track + button
5. Multifunction button
6. Volume/track - button
7. LED
8. Micro-USB input
9. Micro-USB cover
10. Magnetic clasp

Overview of pictograms
Pictograms for pressing a button

Pictogram	Meaning
	Press and immediately release the button
	Press the button twice
	Press the button and hold for 2 seconds

Pictograms for the LED

Pictogram	Meaning
	The LED lights up
	The intervals signify flashing
	The LED lights up/flashes continuously
	The time the LED lights up before blinking

Examples of pictograms that may be used in this manual:

Pictogram	Meaning
	The LED flashes continuously
	The LED lights up for 3 seconds, then off, and repeat
	The LED lights up, then off for 2 seconds, and repeat
	The LED lights up continuously
	The LED continuously flashes blue and red per second

Overview of the LED indications
LED indications during operation

LED	Meaning
	The headphones switch on Pairing/connecting with a device is successful
	The headphones switch off Pairing with a device is unsuccessful
	The headphones are in pairing mode
	Incoming call
	The device is/devices are successfully cleared from the headphones
	The headphones are in idle mode (e.g. headphones are paired but not connected to the device)

Overview of buttons
Multifunction button

Press	Function
	Accepts/ends a call Accepts an incoming call and ends the active call Plays/pauses a track
	Rejects a call Transfers a call between the headphones and the smartphone
	Accepts an incoming call and holds the active call/Toggles between 2 calls
	Activates the voice control

Volume/track + button

Press	Function
	Increases the volume
	Plays the next track

Volume/track - button

Press	Function
	Decreases the volume
	Plays the previous track

Getting started

Charging basics

A complete charging cycle takes about 1.5 hours. Before using the headphones for the first time, charge their rechargeable battery for a complete charging cycle without interruption.
It is recommended to charge the headphones using only the supplied USB cable. If you are charging using an external USB power adapter, it is recommended to use an adapter with an output rating of 500 mA or higher.

LED	Meaning
	Charging
	Fully charged

Charging the headphones

1. Open the micro-USB cover to access the micro-USB input.
2. Connect the micro-USB plug of the charging cable to the micro-USB input of the headphones.
3. Connect the USB plug to the USB port of your computer. If you are using an external power adapter, connect the USB plug to the power adapter or to the USB car charger adapter, and connect to the power source. The LED flashes/lights up depending on the battery life of the headphones. The headphones utilize an intelligent battery charging technology that prevents overcharging.
   

Charging time may take longer at ambient temperatures below 15°C/ 59°F.

Pairing the headphones

Danger of malfunction!
The transmitted radio waves of mobile phones can impair the operation of sensitive and unprotected devices.

• Only make calls with the headphones in locations where Bluetooth wireless transmission is permitted.

The M2I EBTS W In-Ear Wireless headphones comply with the Bluetooth 4.2 standard. In order that data can be transmitted wirelessly using Bluetooth technology, you have to pair your headphones with compatible Bluetooth devices that support the following profiles:

• Hands Free Profile (HFP)
• Audio/Video Remote Control Profile (AVRCP)
• Advanced Audio Distribution Profile (A2DP)

When you switch the headphones on for the first time, they automatically go to pairing mode. If the headphones have already been paired with a few devices, they automatically try to connect to the two most-recently connected Bluetooth devices. The headphones can save the connection profiles of up to eight Bluetooth devices or smartphones.
If you pair the headphones with a ninth Bluetooth device, the saved connection profile of the least used Bluetooth device will be overwritten. If you want to re-establish a connection with the overwritten Bluetooth device, you have to pair the headphones again.

To pair and connect the headphones to a PC or Mac, it is recommended to use a Sennheiser Bluetooth USB dongle, such as the BTD 800 USB.

Pairing the headphones with a Bluetooth device

Ensure that the headphones are off and within the 20 cm range of your smartphone when performing this procedure.
The headphones automatically go to pairing mode when switched on for the first time.

1. Press the multifunction button for 4 seconds.
   You hear the voice prompt "power on", followed by a beep sound. The LED flashes blue and red. The headphones are in pairing mode.
   
2. Activate Bluetooth on your smartphone.
   
3. On your smartphone, start a search for Bluetooth devices. All active Bluetooth devices in the proximity of your smartphone are displayed.
   
4. From the list of Bluetooth devices found, select "*** IE FREE". If necessary, enter the default PIN code "0000".
   If pairing was successful, you hear the voice prompt "connected". The LED flashes blue 3 times.
   
   If no connection is established within 5 minutes, pairing mode is terminated and the headphones switch off. If necessary, repeat the pairing procedure.

Disconnecting the headphones from your Bluetooth device

• Deactivate Bluetooth on your smartphone.
  The headphones are disconnected from the smartphone. The headphones then search for other paired devices. If no device is found, you hear the voice prompt "lost connection". The headphones go to idle mode.
  

Using the headphones

Wearing the headphones

1. You can wear the in-ear headphones with the cables either behind your head or in front.
   
2. Adjust the cable organizer for a perfect fit.
   
3. If necessary, snap the magnetic clasps together to keep the in-ear headphones secure around your neck.

• Before putting the headphones on, set the volume to a low level.
• Do not continuously expose yourself to high volume levels.
• Press the multifunction button for 2 seconds.
  You hear the voice prompts "power on" and "connected". The LED flashes blue 3 times.

Ensure that Bluetooth is active on your smartphone when switching the headphones on.

Switching the headphones off

• Press the multifunction button for 4 seconds.
  You hear the voice prompt "power off". The LED flashes red 3 times.

Adjusting the volume

Danger due to high volume levels!
Listening at high volume levels for long periods of time can lead to permanent hearing defects. Switching between audio sources may cause enormous volume jumps that can permanently damage your hearing.

• Before putting the headphones on and before switching between audio sources, adjust the volume to a low level.
• Do not continuously expose yourself to high volume levels.

You can adjust the volume for music and phone calls, depending on your preferred sound level.

• Press the volume/track + or - button once to increase or decrease the volume.
  When the minimum or maximum volume is reached, you hear an alert.

  Press	Function
  	Increases the volume
  	Decreases the volume

Checking the battery life of the headphones
You can check the remaining play and talk time when the headphones are in idle mode, are not actively playing music, or are not used for making calls.

• Quickly press the Volume/track - button.
  You hear the voice prompt announcing the remaining play time.

  Voice prompt	LED	Meaning
  "recharge headset"		Battery is almost empty (less than 2% charged) Battery is less than 10 %
  "below 1 hour play time"		Battery is less than 10% charged
  "between 1 and 2 hours play time"		Battery is less than 20% charged Battery is less than 50 %
  "between 2 and 4 hours play time"		Battery is less than 50% charged Battery is more than 50 %
  "between 4 and 6 hours play time"		Battery is more than 50% charged

Battery life indicator on your device

The battery life of your headphones may also be displayed on the screen of your smartphone or device.

Playing music/videos

If your audio source supports the AAC, aptX, or aptX LL codec, the M2 IEBT SW In-Ear Wireless automatically plays your music wirelessly in stunning high-resolution audio quality. If the audio source does not support any of these audio codecs, the M2 EBT SW In-Ear Wireless plays music in standard audio quality.
If you are using the headphones to watch videos on a device that supports the aptX LL codec, the synchronization of sound to the visual media is automatically optimized, thus giving you a highly accurate audio-visual experience.

• Pair and connect the headphones with your smartphone.
• Play music/videos on your smartphone or device.
  The audio plays through the M2 IEBT SW In-Ear Wireless headphones.

Controlling music playback
The following music functions are available when the headphones and device are connected using _Bluetooth. Some smartphones or music players may not support all functions.

	Playing/pausing music Quickly press the multifunction button.
	Press	Function
		Plays or pauses music
	Playing the next track Press and hold the volume/track + button for a second to play the next track.
	Press	Function
		Plays the next track in the playlist
	Playing the previous track Press and hold the volume/track - button for a second to play the previous track.
	Press	Function
		Plays the previous track in the playlist

Making calls on the headphones

The following call functions are available when the headphones and the smartphone are connected using Bluetooth. Some smartphones may not support all functions.

Making a call

• Dial the desired number on your smartphone.
  If your smartphone does not automatically transfer the call to the headphones, select M2 IEBT SW In-Ear Wireless (*** IE FREE) as the audio source on your smartphone (see the instruction manual of your smartphone if necessary).

Accepting/rejecting/ending a call
If your headphones are connected to a smartphone and you receive a call, the ring tone plays in the headphones and the LED flashes purple.
If you are playing music when you receive a call, the music pauses until you end the call.

• Press the multifunction button accordingly:

  Press	Function		Voice prompt
  		Accepts a call
  		Ends a call	"call ended"
  		Rejects a call	"call rejected"
  		Accepts an incoming call and ends the active call
  		Puts the call on hold
  		Accepts an incoming call and puts an active call on hold
  		Toggles between 2 active calls
  		Rejects an incoming call and continues the active call

Muting/unmuting a call

• Quickly press the multifunction button twice while on a call.

  Press	Function
  	Mutes the call
  	Unmutes the call

Transferring a call to/from the headphones
When a call has been established, you can transfer the call between the headphones and the smartphone.

• Press and hold the multifunction for a second.

  Press	Function
  		Transfers a call from the headphones to the smartphone
  		Transfers a call from the smartphone to the headphones

Redialing
You can use this function when the headphones are not actively playing music or are used for making calls.

• Press the multifunction button twice.

  Press	Function		Voice prompt
  		Redials the last number called	"redialing"
  		Cancels redialing	"call ended"

Voice control function
You can use this function when the headphones are not used for making calls.

1. Press the multifunction button three times.

   Press	Function		Voice prompt
   		Starts voice control	"voice dialing"

2. Say your voice command, such as "Call Jane". The Bluetooth smartphone calls Jane.

Care and maintenance

Liquids can damage the electronics of the product!
Liquids entering the housing of the product can cause a short-circuit and damage the electronics.

• Keep all liquids away from this product.
• Do not use any solvents or cleaning agents.

Changing ear adapters
You can change ear adapters depending on the size of your ear canal. Spare ear adapters are available from your local Sennheiser partner.

1. Lightly pull the ear adapter away from the in-ear sound tunnel until it is completely detached.
   
2. Secure the new ear adapter by pushing it back onto the in-ear sound tunnel. Ensure that it completely locks into place.
   

Information about the rechargeable battery
Sennheiser ensures and guarantees that the battery performs at the optimum upon purchase of the headphones. Upon purchase or within the warranty period, if you suspect that the battery is obviously defective, please immediately return the headphones to any Sennheiser service partner.

Troubleshooting

If you encounter a problem that is not listed in the table, or if the solutions provided do not work, please contact an authorized Sennheiser service partner for assistance. To find a Sennheiser service partner in your country, visit www.sennheiser.com.

Leaving the Bluetooth transmission range

Wireless calling and streaming are only possible in the Bluetooth transmission range of your smartphone. The transmission range largely depends on environmental conditions such as wall thickness, wall composition etc. With a free line of sight, the transmission range of most smartphones and Bluetooth devices is up to 10 meters.
If the headphones leave the Bluetooth transmission range of the smartphone, the sound quality deteriorates and you hear the voice prompt "lost connection". At this point, the connection breaks down completely. You can re-establish the connection if you re-enter the Bluetooth transmission range and you hear the voice prompt "connected".

• To re-establish the connection, press the multifunction button.

Clearing previously paired devices

1. Set the headphones to pairing mode.
   The LED flashes blue and red. The headphones are in pairing mode.
   
2. Press the Volume/track + button for 2 seconds.
   The LED flashes purple 3 times. The headphones are permanently disconnected from all devices and immediately go into pairing mode.
   

Specifications