... requirements!Features: * high-density and programmable communication media processor.* H.264 video compression * Waterproof,IR distance 50m* Support wireless ... 4,9,16,25,36, 64,81-channel , no user limited , centralized monitor, remote record and playback , Skype message alarm, ... : in kind prevail)Body Size185x75x53mm (L*W*H)Package size240x179x97mm (L*W*H)P/TPT Controlcan external link 1 way RS485 ...