... Channels Portable USB DVR 4 channels video input in one card, the maximum display/recording rate is 25 fps under PAL/NTSC format.1 ... recording mode, recycling recording method available.Support MPEG-1/2/4 video compression format. Support S-VIDEO ... Compression FormatMPEG4Video Resolution704x576,352x288(PAL) 640x480,320x240(NTSC)Recorder MediaHDD, USB Disk, ZIP, CD-R/WRecord ModeMotion / Schedule / ...