Retevis RM21 Bedienungsanleitung Seite 4

1. Antenna: External professional 50Ω antenna
2. 3.5mm Headphone Jack: To make it waterproof, tighten clockwise when not in
use.
3. Power/Volume switch
4. Speaker
5. Microphone
6. Fallen Overboard Detection
If the radio falls into the water, when the detection button and the charging contact
are in the water at the same time, the back of the radio will emit a red light to
indicate.
7. Display: Indicates various functional states of the radio.
8. PTT Button: Push to talk
9. NRC Noise Reduction Function Key
Short press to turn on the noise reduction function; Short press again to turn off it.
10. Monitor Key: Short press to turn on the monitor function; Short press again to
turn off.
11. 16/C Key
·Channel 16 is the default channel with the base station and is used for the
emergency channel, which is monitored while the dual-band watch is enabled.
·Short press to enter the emergency Channel 16
·Press and hold for 1 second to enter the set frequently-used call channel.
·Long press this key until the channel number flashes; Press the UP or DOWN key
to select
·the corresponding channel. Press this key again to select that channel as
frequently-used call Channel.
12. CALL Key
·Short press to alarm. After sending out the alarm signal by the short press, it will
take another 30 seconds to press CALL to give the alarm again. It can't continuously
give the alarm.
·Note: If the NRC function is enabled, the radio can only transmit the alarm tone but
can not receive it.
13. MENU Menu Key
Short press to switch menu options; Press UP or DOWN key to select the
corresponding settings and long press to save the changes.
14. FAV Key
·When there are favorite channels, short press FAV will appear those channels.
These channels are marked with an "M" next to them. At this time, short press FAV
key continuously to switch the favorite channel.
·When there is no favorite channel, short press FAV is not valid; Long press FAV for
1 second to add the individual channel as favorite, or clear the existing favorite
channel. When the scan function is enabled, only favorite channels will be scanned.
15. DW & UIC Key
·Short presses for switching between call channels and weather channels.
·Short press to enter the weather channel mode, then press UP or DOWN key to
choose a weather channel.
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