OperationMonitorThis feature enables users to listen in for weak signals on the currentchannel at the press of a button.To use monitor,• For continuous listening.Press and hold [SCAN/MON]A beep tone will be heard andthe receiver circuit will stay open, lettingin both the noise & weak signals.• RX LED flashes green.• To return to normal receive modePress [SCAN/MON]CTCSSCTCSS is a feature that allows a groupto talk to each other without hearingother users on the same channel.1. Select desired channel.2. Press [MENU/MEM] 3 times.DCS/CTCSS setting ashes.3. Press or to change the selection.4. Press & hold [MENU/MEM] to save and exit.NOTE23 Handheld UHF-CB TransceiverUNIDEN UH810S/UH820SSelect oF to turn DCS/CTCSS off for the selected channel.