Function Identification: Headset Receiver
1.
3.5mm Headphone Socket
2.
LED Indicator of Power/Signal
3.
Volume Control
4.
Mute Button for Verbal Communications
5.
Microphone
6.
Auto Tune Button for Frequency Channel
7.
Sound Balance Control (Left/Middle/Right)
8.
Belt-Clip
9.
Battery Charging Contact
10. Power On/Off