Oricom CITIZEN BAND RADIO PMR1200 - Manual (Page 21)

21
Operation
LCD Screen Back Light
Every time the Power/Vol button is activated (except PTT
and CALL button), the LCD Screen back light will illuminate
for 5 seconds.
Microphone/Earphone/Charge Jack
Your radio is equipped with an auxiliary microphone,
earphone, and charge jack located at the opposite side of
the PTT button.