Promate proHarmony.3 User Manual page 4

Right loudspeaker
7
Left loudspeaker
8
Microphone
9
Micro USB — Charging jack
10
VOL+ — Volume up
11
12 VOL- — Volume down
Bluetooth 3.5mm Audio Adapter
1 Multi-function button (MFB): Switching on/off,
pairing
2 Charging jack
3 LED indicator
1.1 Charging the Headset
The headset comes with a built-in rechargeable battery, prior to using it, it is
recommendable to charge the battery fully for the first time.
When the headset is low power, red LED flashes twice and the headset emits three "Dong"
tones every 20 seconds. Please recharge the battery of the headset.
Connect the USB cable to an computer USB port and the USB cable plug to the charging
jack of the headset. Red LED is on while charging. It takes about 2 hours to charge the
battery fully. When charging has completed, red LED will be off.
1.2 Charging the Bluetooth 3.5mm audio adapter
4 3.5mm audio jack
5 TX/RX switch
6 3.5mm to 3.5mm audio cable