Features:, 2, 4 GHz 4CH RX module, Video scramble, ID addressing, Omni directional dipole antenna 3dBi, 4 Channel selectable by switch, Built-in Bias-Tee 3, 3V/25mA for active antenna connection, Alarm output for siren or flashing Build-in alarm buzzer), Audio Output, Video Output, Technical Data:, Frequency Channels - CH1: 2414MHz, CH2: 2432MHz,CH3: 2450MHz, CH4: 2468MHz, Sensitivity -82dBm, RF Impedance - 50 Typical, Video Input/ Output - 1, 0 Vp-p Composite @ 75, Audio Input/ Output - 2, 0 Vp-p Typical, 2, 7 Vp-p Max, @ 600, Alarm - NC/NO/COM, Power Consumption - DC 12V/250mA, Operation Temp, -10C ~ 50C, Storage Temp, -30C ~ 85C, Dimensions - 110 x 88 x 30mm (without Antenna), SKU: SUPN097