Retevis RB66 - Voice Broadcast Channel; VOX Operation; Scan Function; Non-standard CTC;DCS

1.6Chinese/English voice broadcast channel function
The voice broadcast column of the software reads: None, Chinese, and
English.
1.7VOX
The side button " + / - " of the radio is set to VOX in the software, long
press and hold the side button " + / - " on the radio for three seconds to
turn on the VOX function, and long press the side button " + / - " again to
turn off the VOX function.
Note: The higher the gain level of the VOX, the lower the volume required
for VOX (the gain level can be selected from 0-9)
The longer the VOX delay, the longer the VOX exit time, (VOX delay is
divided into 0.5/1/1.5/2/2.5/3s)
1.8 Scan
Set the side key " + / - " of the radio as the scan function in the software,
long press the side key " + / - " on the radio for three seconds to turn on
the scan function, and long press the side key " + / - " again to close the
Scan function.
1.9 Non-standard CTC/DCS
Non-standard CTC/DCS include analog sub-tone CT and digital sub-tone
DCS
Analog sub-tone CT can input any analog ctcss between 58-260HZ.
Digital sub-tone DCS can input any digital cdcss between DOOON-D777N
and DO01I-D777I.
1.10 Channel Lock
Set the side key " + / - " of the radio as the channel lock function in the
software, long press the side key " + / - " on the radio for three seconds to
turn on the channel lock function, and long press the side key " + / - "
again to close the channel lock function.
1.11 Flashlight
Set the side key " + / - " of the radio as the flashlight function in the
software. Press and hold the side key " + / - " for three seconds to turn on
the flashlight function. Press and hold the side key " + / - " again to turn it
off.
1.12 Monitor
When setting the side button " + / - " of the radio to monitor in the software,
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