Plantronics MHA 100 Guide De L'utilisateur page 6

Features
1. Volume Control Up/Down
2. Belt Clip
3. Coiled Cord for Cell
Phone Connection
4. On/Off LED (RED)
5. 2.5mm Headset Jack For
Headset Connection
6. Low Battery Indicator (RED)
1
3
Diagram A.
5
2
4
6