X-Micro Tech. BT400GII - Manual (Page 6)

Turning the Headset ON/OFF
To turn your headset ON:
Press and hold the power button for 3 seconds, and then the speaker
will emit two high tones. When the power is on, the LED in the power button
starts to flash blue.
(Note: The headset will go to pairing mode if you press and hold the power
button for 5 seconds from OFF status)
To turn your headset OFF:
Press and hold the power button for 3 seconds, and then the speaker
will emit two high tones. When the power is off, the LED in the power button
stops flashing.
Charging the Battery
Before using X-Micro Bluetooth Headset you will have to charge the battery for
approximate 3 hours to ensure a fully charged battery.
1. Plug the AC power adapter into the DC POWER IN socket situated at the
back of the headset.
2. Plug the AC power adapter’s plug into an electrical wall outlet.
3. When charging, the LED in the power button is on and remains lit until
charging is complete.
4. Charge the headset for approximate 3 hours or until the LED in the power
button extinguishes.
5. Remove the AC adapter from the headset’s AC power jack.
Notice: The headset doesn’t work while it’s charging.