RT28 Manual
Function Introduction
◆Frequency
FRS 462.5625~462.7125，462.5500 ~462.7500 MHz （RX/TX）
◆ Up to 16 Channels
◆ Commercial FM radio
◆ 50 Groups CTCSS，105 Groups of standard DCS
◆ Time-out timer(TOT)
◆ Battery saving function
◆ Alarm function
◆ USB rapid charge
◆ Programmable by PC
Item Description
Note: The radio outlook based on the real radio.
A.LED Indicator: Green LED flashes when receive the signal, Red LED flashes when transmission.
B. Channel knob: Rotate the knob to choose the channel (CH1-CH15), CH16 is scan channel.
C.ON/OFF knob/Volume knob: Rotate the knob clockwise to turn on the radio, anticlockwise to turn off the radio.
By rotating to control the volume.
D.PTT switch: Press PTT and speak to the microphone to call, listen when release.
E. Monitor: When press Monitor key, the squelch opened and the background noise comes out; the squelch close when release the
monitor key.
F.USB Rapid charge plug.
G. Speaker/Microphone rubber plug: Please cover when not use the speaker and microphone.
H. Insert loudspeaker.
J. Microphone
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