scan button.1. Press MON/FUN until appears. The current setting flashes.2. Press UP/DOWN to select a desired channel or to disable the function.3. Press PTT to set or MON/FUN to continue set up.Note: when the priority channel is set, no matter the priority channel is added into scan list or not, once scan is initiated, it willbe priority scan.Keypad Lock SettingThe keypad lock disables the Up and Down buttons and will not disable PTT, SCAN and EMG buttons. It also disables thescan function, but allows you to use the MON/FUN to monitor the channel.When the keypad is locked, the will show in the display.1. Press MON/FUN until appears. The current setting flashes.2. Press UP/DOWN to turn on or off.3. Press PTT or MON/FUN to set.To unlock the radio, press and hold SCAN for 3 seconds and until is no longer displayed.TECHNICAL SPECIFICATIONChannelsCTCSSCDCSSFrequency BandOperation temperatureFrequency stability Vs temperatureBandwidthTx powerClear RangePower adaptorBattery TypeBattery life (5/5/90 duty cycle and at high TX power mode)Water Proof Grade32 (maximum)3883400~470MHz-20 ~+55℃ ℃+/-2.5ppm12.5kHz/25KHz5W / 1W12KmInput:110-240v-50/60Hz 0.2AOuput:12.5v, 400mA7.2V 1100mAh Li-Ion7.0 hrsIPX2