... : BNC Video Input:4 Cams Audio Input:2Ch Audio on board, 1 Ch PC Audio Video Output:1 Ch VGA Video ... * Mobile phone surveillanceSpecificationsInput TypeBNCVideo Input4 CamsAudio Input2Ch Audio on board, 1 Ch PC AudioVideo Output1 Ch VGA ... NTSC)Compression FormatMPEG4Video Resolution704x576,352x288(PAL)640x480,320x240(NTSC)Recorder MediaHDD, USB Disk, ZIP, CD-R/WRecord ... LW-USB4 USB DVR /USB recorder