H.264,4ch network dvr with 7 inch LCD screen HDD capacity 2000G,support ... inch LCD screen,4ch video BNC inpurt,1ch video output,2ch audio input,1ch audio output,support PTZ,network function, 2 USB port ... .Box size: 28*23.5*20.5 CM 7CH Digital Video Recorder H.264 Compression Realtime Recording GS-DVR8/4AHNP