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V. Advanced operation
5.1 Pairing your headphones with a mobile device
1. Press and hold the power button for 3 seconds to turn on the headset. When
powering up for the first time, the headphones are discoverable for 2
minutes and are ready for pairing. The LED indicator alternately flashes
green and blue.
2. Set your Bluetooth
phone to 'discover' the wireless headphones.
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3. Place the phone and headphones within one meter from each other.
4. Select the XTH-D660MK headphones from the list of newly discovered
devices in your phone.
5. Your device will confirm when pairing is complete. The LED indicator glows
in green.
6. If after 60 seconds the pairing process fails, please repeat steps 1 through 5
as described above.
7. When not in use, turn off the headphones with your phone once, as it will
pair again automatically.
8. The automatic re-pairing feature will allow the headphones to be
reconnected after being switched back on or when placed again within
wireless range.
5.2 Call management using your wireless headphones
• When there is an incoming call press the phone button to pick it up. You may
also press the answer button on your smartphone to receive the incoming
call.
• To end a call, simply press the phone button once again.
• To reject a call, press and hold the phone button for about 2 seconds.
• Press the phone button twice to redial the last number called.
5.3 Music playback
• Press the play button to start and stop audio playback.
• Briefly press the previous track/volume – and next track/volume + buttons to
go to the previous or next track.
• Press and hold the volume – or the volume + buttons to decrease or increase
the volume level on the headphones.
• When listening to music using your smartphone, playback will pause to allow
the call to go through.
• As soon as you hang up, music playback will resume automatically.
VI. Troubleshooting
If you cannot connect the headphones to your phone do as follows:
• Ensure that the headphones are charged, switched on, paired with, and
connected to your phone.
• Make sure that the Bluetooth
feature is activated on your phone.
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• Check that the headphones are within 30 feet of your phone and that there
are no obstructions between the headset and the phone, such as walls or
other electronic devices.
VII. Technical specifications
Headphone
Form factor
Driver unit
Maximum power output (R.M.S.)
Frequency response
Signal to noise ratio
Impedance
Sensitivity
Color
Microphone
Form factor
Directivity
Frequency
Impedance
Sensitivity
Battery
Type
Charging time
Run time
Standby time
Charging method
Additional information
Connection type
Wireless RF frequency
Wireless range
Buttons
Cable length
Weight
Dimensions (WxHxD)
Warranty
*Estimated battery run time depending on usage and volume settings
**3.5mm stereo cable not included
On-ear
φ40mm
40mW
100Hz~20kHz
80dB
32Ω
119+-3dB
Black
Built-in
Omnidirectional
100Hz-10kHz
680Ω
-42dB +-3dB
250mAh rechargeable ternary polymer lithium battery
1.30 hour
Up to 8 hours*
30 hours
Micro USB (5V)
Bluetooth
JL v5.0, 3.5mm**
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2.4GHz-2.480GHz
33ft
Power on/off/play/pause
Volume -/previous song
Calls
Volume +/next song
Micro USB to USB: 2.2ft
5.7oz
6.2x7x2.9in
One-year limited warranty
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