Button Control; Lock Key; Power Saving Function; Headphone Function - Retevis Rb628B Bedienungsanleitung

Button control

1) [Power switch/scan] key: long press this key to turn on or off the radio; short
press this key to turn on or off the scan.
2)【˂ 】key: long press this key to switch between radios and monitor modes;
short press this key to increase the volume.
3) 【˃ 】key: long press this key to SCAN modes; short press this key to
decrease the volume.
4) 【◎ 】key: long press this key to operate the lock or unlock function.
5) 【PTT】key transmit.

Lock key

The keyboard lock function is to prevent users from misoperation when they don't
want to change the settings of the radio.
1) Press and hold the 【◎ 】key until the hear "Di" tone to enter the keyboard
lock state.
2) Long press and hold the 【◎ 】key until the hear "Di" "Di" tone to exit the
keyboard lock state.
Note: When the keyboard is locked, except for pressing the [PTT] and [Power
Switch] keys, any key press will sound a key failure tone.

Power saving function

The radio has a unique function to extend the service life of the battery. If there is
no call or voice reception within 10 seconds, the walkie-talkie will automatically
enter the power saving mode. In this mode, the radio can still receive information.

Headphone function

1) Connect the earphone to the walkie-talkie (radio A&B).
2) Press the PTT button of the headset of the radio A to send a voice to the MIC
of the headset, and the radio B should be able to receive normally. Repeat the
same operation on radio B.

Frequency table(PMR)

Channel Frequency
1 446.00625MHz
2 446.01875MHz
3 446.03125MHz
4 446.04375MHz
5 446.05625MHz
6 446.06875MHz
7 446.08125MHz
8 446.09375MHz
Max Power Channel
Output
0.5 W 9
0.5 W 10
0.5 W 11
0.5 W 12
0.5 W 13
14
0.5 W
15
0.5 W
16
0.5 W
4
Frequency
446.10625MHz
446.11875MHz
446.13125MHz
446.14375MHz
446.15625MHz
446.16875MHz
446.18125MHz
446.19375MHz
Max Power
Output
0.5 W
0.5 W
0.5 W
0.5 W
0.5 W
0.5 W
0.5 W
0.5 W