Retevis RT669 Mode D'emploi page 6

Automatic Battery Saving Function
This function starts when the machine does not receive a signal or does not perform an operation
for more than 10 seconds. The machine automatically stops this function when it receives a
signal or performs an operation.
Chinese/English voice prompts
Press and hold PTT+DOWN + channel (10) to power on, Switch voice prompt function
Press and hold PTT+DOWN + channel (15) to power on, Switch Chinese/English Language.
Low Battery Voltage Warning
When the battery voltage is 3.4v, the radio voice prompts: "charge battery". When the battery
voltage is 3.2v, the radio is forbidden to transmit.
All manuals and user guides at all-guides.com
General
Frequency range
Memory channels
Operation voltage
Frequency stability
Transmitter
RF Power
Modulation
Maximum deviation
Spurious emission
Transmission current
Preemphasis Character
Note：The above specifications/technical instructions are for reference only because of the
continuous improvement of the technology. Please refer to the physical object.
Safety Information
PMR446 Operation temperature
16 Groups Mode of operation
DC 3.7V Antenna impedance
±2.5ppm
Volume
Receiver
Sensitivity
≤0.5W
Squelch Sensitivity
FM
Audio power
≤±5KHz
Audio distortion
≤-60dB
Intermediation(W/N)
≤1000mA
Receiver current
6dB per octave
-20℃—+50℃
Simplex
50Ω
55x25x153mm
<0.16uv (12dB SINAD)
<0.2uv
≥380mW
<10%
≥65dB
≤380mA