External Speaker (SPK) Jack (2)
This jack accepts an Audiovox headset connector.
External Microphone (MIC)/Charging (CHG) Jack (1)
This jack accepts an optional Audiovox Microphone/Headset assembly, or the plug from an AC/DC Wall charging adapter, Model GMRS1545AD (supplied).
Scan/Lock Button (7)
Press this button momentarily to enable or disable the scan mode. Press and hold button for more than 1 second to lock or unlock the key pad, except PTT, EMG and Monitor (M). When the keypad is locked, the ( 
) icon will appear in the top left corner of the display.
Operating Modes and Features
GRMS Operation
-From GMRS standby mode, press the MODE button so the Channel number flashes.
-Select the desired channel with the Up (9) and Down (13) Buttons. When receiving a call, the signal strength meter appears to indicate incoming received signal strength and the Monitor section of the Transmit/Monitor LED (5) lights green.
-Press and hold the PTT button (17) to transmit, then speak into the microphone clearly and slowly. The Transmit section of the Transmit/Monitor LED (5) lights red.
-Release PTT Button (17) to receive.
-Communication can only be accomplished when the channel and CTCSS tone frequency of at least two parties are the same.
-The CTC icon will be displayed on the LCD panel if the CTCSS tone frequency function is enabled.
Channel Selection
In order to communicate with other GMRS units, both transmitting and re- ceiving party must be on the same frequency.
10