... IR LED Lights Built-in Microphone Support 4 channels 2.4Ghz Wireless Camera and ReceiverReceiver:Output: Double Systems (NTSC)Dimensions: 120 ... :50Hz NTSC/EIA:60HzMinimum Illumination:3LuxInput Power:27dBmOutput Frequency: 2.4GHz (2.414Ghz, 2.432Ghz, 2.450Ghz, 2.486Ghz)Frequency Control ... : 350mAPower Consumption: =4WWorking Temperature: -10-+50Size: 68*52*105mm 2.4Ghz Wireless Receiver and Camera