User's Manual

Version: 1, Issue Date: July 20, 2007 Page 6 of 10
3. INSTALLING THE EARPHONE
Insert the earphone into the connection at the top of the radio
. Tighten
the screws on the head to secure it.
There are microphone, speaker and PTT buttons on the earphone
.
FEATURES AND OPERATION
1. TURN THE UNIT ON / OFF
(Before using radio, please confirm earphone cable had been connected to the radio.)
Press and hold VOLUME UP (more than 3 seconds) until you hear “Power on”, and the Green LED
light appears
Press and hold VOUME UP again (more than 3 seconds) until you hear “Power off”, the
radio will be powered off
2. VOLUME ADJUSTMENT
To change the volume level:
Press VOL + or VOL - to increase or decrease volume. Every time button is pressed, you will hear one “beep”
sound
.
(The volume level setting can be programmed by PC)
3.KEYPAD LOCK
Drawing of Earphone