... CompressionMPEG4Video Resolution704x576,352x288(PAL);640x480,320x240(NTSC)Recorder MediaHDD, USB Disk, ZIP, CD-R/WRecord ModeMotion/Sensor/Schedule/ ... sensor, motion, video loss, and HDD space shortage.4. Support schedule recording mode, recycling recording method available5. MPEG4 ... for preventing PC deadlock.10. Auto mail . 4 channel video & 1 channel audio USB DVR / Laptop usb Dvr card