digital video recorder dvr -H.264,4chs video,1ch audio -3G ... Money H.264 4Chs 3G D1 CCTV Network DVR Recorder Features1)H.264 main profile compression algorithm ideal for ... Support 2*USB 2.0 port for mouse,backup,DVD-RW,movable hard disk,upgrade etc...7).Alarm ... NetworkBackup ModeNetwork download/Flash stick/movable HDD/SATA HDD/DVD-RWInterfaceVideo Input4channelVideo Output2 channel TV output BNC,1.0Vp ...