1.) Power On/Off/Volume Adjustment
It is for use to turn the radio on/off and to adjust the volume level.
The indicator glows red when transmitting and green when receiving.
3.) Channel Knob
It is used to select channels.
4.) Top Key (Emergency Key)
For emergency alarm function.
5.) Antenna
Transmitting / receiving signals.
6.) Speaker
It is used to output voices.
Input voices.
Press(PTT) button to put the radio in transmitting state;release the button
restore to receiving state.
9.) Programmable Side Key1
As defined by programming software.
10.) Programmable Side Key2
As defined by programming software.
11.) Speaker and Microphone Jack
It is for use to connect to earphone you have purchased.
If needed,you can connect to a PC programmable cable in order to