Contents Contents The ADAPT 660 headset ......................................2 Package contents ........................................3 Product overview ........................................4 Overview of the headset................................................4 Overview of the dongle ................................................7 Overview of the icons ................................................7 Getting started ..........................................8 Pairing the headset with Bluetooth ® devices .......................................8 Using the audio cable ................................................10 Using the USB cable ................................................10 Installing the Smart Control app.............................................11 Installing the EPOS Connect software ........................................11...
A list of accessories can be found on the product page at www.eposaudio.com. Trademarks The Bluetooth word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by Sennheiser Communications A/S is ® under license.
Package contents Package contents ADAPT 660 Bluetooth headset Case BTD 800 USB or BTD 800 USB-C Bluetooth dongle USB cable with USB-A and micro-USB plug Audio cable with 2.5 mm and 3.5 mm jack plug Quick Guide on the box Safety Guide Compliance sheet ADAPT 660...
Product overview Product overview Overview of the headset Headband Bluetooth switch ANC switch Teams/Pairing button LEDs Microphone Audio socket USB socket ANC Microphones Touch pad Overview of the headset LED indications • Headset connected • Headset turned off • Headset turns on •...
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Product overview Overview of the headset controls Ear cups Page Turns the headset on Turns the headset off Touch pad Function Page Accepts a call 2 calls: Answers incoming & ends active call Starts / pauses media playback Turns TalkThrough on/off (ANC turned on) Puts an active call on hold (pause) / unholds call 2 calls: Answers incoming &...
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Product overview Bluetooth switch Press Function Page Turns Bluetooth on Turns Bluetooth off Teams/Pairing button Press Function Page Initiates a call Invokes Microsoft Teams Cancels pairing (Pairing mode) Launches Smart Control app* Activates Cortana Pairs the headset with a Bluetooth device Clears pairing list (Pairing mode) * These functions are not supported by all connected Bluetooth devices.
Product overview Overview of the dongle BTD 800 USB BTD 800 USB-C Link LED Link LED Link button Link button USB-C plug USB-A plug Overview of the dongle LED indications Dongle in pairing mode: searching for headset Pairing successful Pairing failed Dongle tries to connect to a Bluetooth device Dongle and Bluetooth device connected Incoming call...
Getting started Getting started Pairing the headset with Bluetooth devices ® CAUTION Danger of malfunction! The transmitted radio waves of mobile devices can impair the operation of sensitive and unprotected devices. Only use Bluetooth where it is permitted. The headset complies with the Bluetooth 5.0 standard. Bluetooth devices need to support the “Hands-Free Profile” (HFP), the “Headset Profile”...
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< 20 cm EPOS ADAPT 660 Select “EPOS ADAPT 660” to establish a Bluetooth One LED flashes 3 times white as soon as the headset connection to the headset. finds a device to connect to. The LEDs turn off.
Connect the supplied USB cable to the USB socket of the headset and a USB socket of your computer. The battery is being charged – see page 22. Click the Audio icon on your PC and select EPOS ADAPT 660. ADAPT 660...
The free Smart Control app allows you to configure and update your headset and offers additional settings. Open the App Store or Google Play app on your mobile device. Search for "Sennheiser Smart Control". Download and install the app. Sennheiser Smart...
Using the headset Using the headset CAUTION Hearing damage due to high volumes! Listening at high volume levels for long periods can lead to permanent hearing defects. Set the volume to a low level before putting on the headset. Do not continuously expose yourself to high volumes. Turning the headset on and connecting it Twist the ear cups to turn on the headset.
Using the headset Adjusting and wearing the headset For good sound quality and best possible wearing comfort, adjust the headset. Put the headset on so that the headband runs over the Adjust the headset so that top of your head and the side with the R marking rests •...
Using the headset Muting the microphone Swipe • backward to mute or • forward to unmute the microphone. You hear a tone. Using Active Noise Cancellation (ANC) This headset provides attenuation of ambient noise using Active Noise Cancellation (ANC) technology. Special microphones optimize speech and reduce background noise.
Using the headset Turns ANC Maximum mode on Turns Adaptive ANC mode on; adjustable via the Smart Control App Turns ANC off Adjusting the Adaptive ANC The Smart Control app allows you to select different ANC modes that offer the optimal settings depending on the application/situation.
Making calls using the headset Making calls using the headset The following functions depend on the connected device. Making a call Initiate the call on your connected device. Softphone Press the Teams/Pairing button to initiate a call via your softphone. If your call is not automatically transferred to the headset: Search this function in the instruction manual of your connected device.
Making calls using the headset Reject / end a call Rejects a call Ends a call Redialing Swipe and hold: Redials the last number ADAPT 660 Bluetooth headset ®...
Making calls using the headset Using the voice assistant / Alexa / voice dial The last connected Bluetooth device will be used for voice assistant or voice dial. For Microsoft Cortana: see page 20. Before you can use Amazon Alexa as a voice assistant, you have to add the headset to the Amazon Alexa app – see below.
Making calls using the headset Managing multiple calls You can use the Headset with up to two connected Bluetooth devices. Softphone Two calls can be managed simultaneously. If you receive a call during an active call, a knock on tone will be played.
Using headset and dongle with Microsoft® Teams / Cortana Using headset and dongle with Microsoft Teams / Cortana ® To use Microsoft Teams and Cortana with the headset: Plug the dongle into the USB port of your computer – see page 8. If Microsoft Teams is already running, the blue LED changes to purple automatically.
Listening to audio using the headset Listening to audio using the headset You can listen to audio via a connected device. The following functions depend on the connected device. Play the media on your connected Bluetooth device. The LED on the dongle lights up blue. Plays audio Pauses audio Plays the next track in the playlist...
Additional functions Additional functions Charging the headset battery Connect the supplied USB cable to the USB socket of the headset and a USB socket of your computer. The battery is being charged. The LEDs light up depending on the battery status of the headset and turn off when the battery is fully charged.
Additional functions Verifying remaining battery power The remaining battery power is shown in the Smart Control app. Some mobile devices indicate the battery status of the headset. You can retrieve information on the remaining battery power at any time – except while you are in a call: Tap and hold the finger on the touch pad until a voice prompt is announced.
Additional functions Changing the sound effect You can use these settings to enhance the quality of your audio according to its genre or category. The sound effects are automatically activated when the headset and the mobile device are connected via Bluetooth or the USB cable.
Additional functions Enabling / disabling voice prompts, tones and changing language You can change voice prompts, tones and language via the Smart control app. You can also change these settings via EPOS Connect. Enabling / disabling voice prompts and tones Start the Smart Control app.
Additional functions If you leave the Bluetooth range The range between headset and Bluetooth device is device dependent. 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 Bluetooth devices is up to 25 meters.
Maintaining the products and updating the firmware Maintaining the products and updating the firmware Cleaning the products CAUTION Liquids can damage the electronics of the product! Liquids entering the housing of the device can cause a short circuit and damage the electronics. Keep all liquids far away from the product.
Maintaining the products and updating the firmware Updating the firmware of the products To update the installed firmware: Install the free of charge EPOS Connect software (see page 11). Updating the firmware of the headset Updating the firmware of the dongle USB-C USB-A USB-A...
If a problem occurs ... If a problem occurs ... Problem Possible cause Solution Page Headset cannot be Rechargeable battery empty Recharge the headset battery. turned on Active Noise Cancellation Rechargeable battery empty Recharge the headset battery. (ANC) cannot be turned Headset turned off Turn the headset on.
If a problem occurs ... Clearing the pairing list of the headset (Reset) Press and hold the Teams/Pairing button until the LEDs Press and hold the Teams/Pairing button until the LED lights up white one after the other. flashes red 3 times. The headset is in pairing mode.
Specifications Specifications Headset - General Wearing style Over-ear, double-sided headband Dimensions (W x H x D) 63 x 136 x 174 mm / 2.48 x 5.35 x 6.85 in Weight 227 g / 8 oz Transducer principle Dynamic, closed Connectivity •...
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