... which case we recommen Features: 4CH laptop USB DVR 4 channels video input .the maximum Display ... 5 level recording quality options available, and the recording frame rate range from 1 to 30 fps adjustable for each channel.Support multi-channel ... 4CamsAudio Input: 2 Ch Audio on board.1 Ch PC Audio Video Output: 1Ch VGA Video ... 640×480,320×240(NTSC)Recorder Media: HDD,USB Disk, ZIP,CD-R/W via PCRecord ...