Retevis RT639 Mode D'emploi page 5

factors including, but not limited to: terrain,weather
conditions,electromagnetic interference,and obstructions.
2.4 Talk Confirmation Tone:
Also called as Roger Beep, which sounds to indicate the
end of a PTT transmission.
2.5 Sending a Call tone Quickly
Your radio is equipped with a call tone. To transmit a call
tone,Press the PTT button once quickly. Both the talker and
listener could hear that.
3. Further Technical Specifications:
Frequency
Operating
temperature range
Power Source
Channels
Range
Transmission Power
Modulation Type
Channel spacing
RF ENERGY EXPOSURE AND PRODUCT SAFETY GUIDE
FOR PORTABLE TWO-WAY RADIOS
ATTENTION!
CH1:446.04375 MHz(88.5HZ CTCSS
CH2:446.09375 MHz(114.8HZ
CH3:446.19375 MHz(146.2HZ
Before using this radio, read this guide which
contains important operating instructions for
safe usage and RF energy awareness and
control for compliance with applicable
standards and regulations.
PMR446
-30~55°C
3xAAA(Not include)
code)
CTCSS code)
CTCSS code)
Up to 2Km(Open field)
≤0.5Watts
FM-F3E
12.5 KHZ
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