... CCC 2. Entry Level DVR300 Series 4ch Network DVR/4 ch DVR 3.H.264 video compression Entry Level DVR400 Series ... 4ch Network DVR/4 ch DVR H.264 video compression, G.711 audio compression; ... , Pagedown, Pageup, Next File, Previous file, Next camera, Previous Camera, RepeatBackup ModeFlash Drive/USB/Network DownloadNetwork FunctionsFully ONVIF compliant,TCP ...