X-Micro Tech. BT400GII - Manual (Page 8)

Answering/Ending a Call
Answering a Call
After being paired with your cell phone, the headset is now ready to receive
incoming calls without handling the phone. When there’s an incoming call, both
the cell phone and the headset will ring simultaneously. Upon hearing the ring
tones through the headset’s speaker you can answer the incoming call by
pressing power button and then speaking normally.
Ending a Call
You can use either of the ways to end a call:
1. Press the headset’s power button to end a call.
2. Press the phone’s keypad to end a call.