REVO America R164D8EM21-2T 16-Channel 2TB DVR Surveillance System with 8 600TVL 80-Feet Night Vision Dome Cameras (White and Black) Connection type: 12 RJ12 and 4 BNC ports Cameras have a built in microphone for audio monitoring capability View and access live and recorded video remotely over the internet or mobile phone Cameras lens: 3.6mm, Resolution: 600 TV lines Hard Drive: 2TB, LED lighting distance: max 80ft