Retevis RB28, Руководство пользователя

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Use the charger to charge
1) Make sure the radio is closed.
2) Insert the Type-c charging plug into the jack of the radio with the rechargeable
battery, and plug the other end of the charger into the power socket on the wall.
3) During the charging process, the battery symbol is displayed on the mobile to
indicate the charging state. When the battery is fully charged, the battery symbol
stops.
Flashing, Advise to keep the radio closed when it’s charging, if you try to perform
an intercom operation during charging, some abnormal phenomena may occur
when the battery is almost empty.
Turn on/off the radio
Press the button to turn on or off the radio. When turn on the radio, the horn of
radio sounds a boot prompt and displays all the icons on the full screen.
After the power-on done, the radio is in the walkie-talkie mode by default,
displaying the currently used channel number and subtone code, etc.
Volume setting
1) In the standby or receiving state, press the ˂ or ˃ key, the LCD of the radio will
display the current volume.
2) Then press ˂ or ˃ to increase or decrease the volume of the radio. 0,1-9 level
the volume can be adjusted.
3) Press the key to decrease the volume to level 0, the mute icon ( ) will be
displayed on the LCD of the walkie-talkie, and the speaker sound will be turned
off.
Note: When the volume is not adjusted to a proper state, Don’t put the speaker of
the walkie-talkie too close to your ears to avoid damage to your ears due to too
much sound.
Transmit and receive
1) Press and hold the [PTT] key, keep a distance of 3 to 5 cm from the micro-
phone, and talk at a normal speaking rate. When the display launches When the
icon ( ) is displayed, it means that a message is being sent. In order to avoid
cutting off your call, please press the [PTT] button to pause for a while, and then
start speaking.
2) When you finish the call, please release the [PTT] key. You can receive the
signal. When receiving, the icon ( ) will be displayed.
TOT function
When you press and hold the [PTT] button for more than 15-180 seconds, the
intercom will emit a continuous warning tone and the intercom will automatically
stop transmitting.
Set the channel
1) In the standby state of the radio mode, press the
◎
key once, the current
channel will flash.
2) Press the ˂ or ˃ key to select the channel number you want to set.
3) Press 【 PTT 】 key to save the current setting and exit the menu or press ◎
3