You will be amazed by the stunning image quality of Hikvision. It’s like comparing the difference between a VHS video tape and a Blu-Ray movie, allowing you to see details and colours like never before.Easy Installation;Installation and setup is easy, simply run the cable from the camera to the HD DVR and click the cables into place and you’re set. – It really is that easy.Getting Started Is A Breeze;Setting up the DVR for remote viewing has never been easier or faster with Hikvision's HD DVR eStay Alert At Any Tim Technical Specifications:Video/Audio InputVideo Compression: H.264Analog and HD-TVI video input: 4-ch,BNC interface (1.0Vp-p, 75 Ω)Supported camera types: 720P25, 720P30, 720P50, 720P60, 1080P25, 1080P30, CVBSVideo/Audio OutputFrame Rate: Mainstream: 1/16 fps ~ Real time frame rateNetwork management Remote connections: 128Hard Disk DriverInterface Type: 1 SATA InterfaceCapacity: Up to 4TBExternal InterfaceNetwork Interface: 1; 10M / 100M self-adaptive Ethernet interfaceUSB Interface: 2 USB 2.0 InterfacesSerial Interface: 1; standard RS-485 serial interface, half-duplex