... for preventing PC deadlock.Features: 4CH laptop USB DVR 4 channels video input .the maximum Display/recording rate is 25 fps under PAL ... .1 Ch PC Audio Video Output: 1Ch VGA Video Output via PCDisplay Rate: 25 fps(PAL), 30(NTSC)Recording Rate: 25 fps ... Port: USB2.0Remote Software : Support Internet Explorer 4 channel easycap usb video capture,4CH laptop USB DVR,car usb dvr,4ch mini dvr