... Type: RCAVideo Input: 4CamsAudio Input: 2 Ch Audio on board.1 Ch PC Audio Video Output: 1Ch VGA Video Output via ... 704×576,352×288(PAL) 640×480,320×240(NTSC)Recorder Media: HDD,USB Disk, ZIP,CD-R/W via ... 4Ch Inptu,4Ch Output,1Ch Relay Output(external I/O board)Communication Port: USB2.0Remote Software : Support Internet ExplorerSpecial attention ... dvr,usb video easycap,4 channel usb2.0 audio capture