Retevis RB639 PMR 446MHz 16 channel 2 way radio. Review + Testing 

Retevis RB639 PMR 446MHz 16 channel Walkie Talkie. Full review and on air testing. Buy Here. bit.ly/3TSWRlk
OverView
1, Portable and Simple Walkie Talkie; work out of the box
2, Blade design, 17mm thick, RB639 ultra thin walkie talkies can fit your palm well
3, Multi function menu key setting allows you to adjust to the required mode at any time, Including alarm and VOX
4, channel lock; long press the channel down button and up button to hear two beeps, and you will fix the current channel.
Spec
GENERAL
Frequency Range
FRS/PMR446
Rated Voltage
3.7V DC
Memory Channel
22/16
Frequency Sensitivity
±0.5ppm
Antenna Impendance
50Ω
Operation Temperature Range
-20℃~+55℃
TRANSMITTER
RF power
≤2W/0.5W
Modulation type
FM
Modulation distortion
5%
Adjacent channel power
60dB
Max FR.Deviation
±5KHz
Current
1300mA
Modulation Noise
40dB
RECEIVER
Receiving sensitivity
0.282μV
Adjacent channel selectivity
60dB
Current
Standby 70mA, working 220mA
Inter-modulation
Audio distortion 5%
Audio power 500mW
What’s in the Box？
Standard Accessories:
RB639 Two Way Radio x2
Li-ion battery x2
Charging line x1
Belt clip x2
User manual x1

Развлечения