Unitech HT680 User Manual page 61

Audio (Headset) OFF/ON:
HT680 is provided with the feature of headset profile. Follow the instruction
below to connect and pair a Bluetooth earphone.
Tap the Scan Device tab to scan Bluetooth
devices around.
Tap Scan Device.
Scanned Bluetooth earphones around are
listed. Later, you may double tap a desired
earphone.
Tap Trusted.
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