... 3.H.264 video compression Entry Level DVR400 Series 4ch Network DVR/4 ch DVR H.264 video compression, G ... modes for choice;Easy backup by using USB port / network;Local / network playback modes for choice;4ch simultaneous playback/rewind/fast ... Previous file, Next camera, Previous Camera, RepeatBackup ModeFlash Drive/USB/Network DownloadNetwork FunctionsFully ONVIF compliant,TCP/IP, UDP, DHCP, UPNP,DNS ...