Baofeng GT-18 User Manual page 7

OPERATIONS
Power on/off and volume adjustment
Rotate the Power/Volume knob clockwise to turn the radio on. Rotate the control clockwise /counter-clockwise to adjust the volume level as you
prefer. To turn the radio off, rotate the control counter-clockwise till hearing a mechanical "click".
Channel selection
In standby mode, directly press the  /  key to step down or down to select the channel. Press and hold the  /  key to quickly switch
channels down or up. The corresponding channel is displayed digitally. When the voice prompt function is turned on, the corresponding channel
is broadcast by voice.
Transmission
To communicate, all radios in your group must be set to the same channel. Briefly press the MONI key to enable the Monitor feature in order to
make sure that the frequency is not busy, and then press the [PTT] key. Release the [PTT] key to receive. Only one user at a time can talk during
radio communications. Therefore, it is important not to transmit when you are receiving a communication and use the transmission mode
sparingly to allow other users to talk. Transmission consumes a significant amount of energy and should therefore be used sparingly to prolong
the battery life. If you are unable to contact a station that you have no problems in receiving, the station may be using CTCSS tones or DCS
codes.
Monitor
The Monitor feature is for excluding (opening) the Squelch, in order to listen to signals that are too weak to keep the Squelch permanently
opened. Hold down the MONI key to enable such function.
Scan
This function can only be activated by programming software. To enable the scan function, all 16 channels must be programmed. When the radio
is turned on, press and hold the  and  keys at the same time, and scanning will start automatically. Whenever any signal is detected, the scan
stops on a busy channel. If you press and hold PTT, you will send on the latest busy channel. Press any function key to exit the scanning state.
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