Retevis RB19 User Manual page 7

Keyboard Lockout
Long press key to lock all buttons,operate it again to unlock.
Power Display
Short press power key to display the current battery level.
Monitoring
Long press key for two seconds to enter into the monitor mo de,
release it to exit.
VOX
This function can be voice activated so the user doesn't have to press
the PTT key.
When "VOX level" in the software is selected,short press
to enter into the VOX mode,then short press
on/off the VOX.
Time Out Timer(TOT)
The purpose of the TOT is to prevent any single person from using a
channel for an extended period of time.An alarm will sound if the
transmission continues beyond the set time.The transceiver will stop
transmission if this occurs.To stop the alarm,release the PTT key and
the transceiver will return to standby.
Busy Channel Lockout
The function can prevent interference from other transceivers using
the same channel.
Battery Power Saving
If there is no signal or operation,the radio will reduce its power
consumption.The battery power-saving function activates when the
channel is unoccupied or has not been in operation.
Low Battery Warning
If the battery power falls to the predetermined value during
transmission,the transceiver will give out a voice prompt,please
charge in time.
Scrambling
It is a voice encryption mode which is different from sub audio.
Companding
It is a function setting which prevents the inter-channel interference.
key or
.
6
key twice
key to turn