Signal System: NTSC / PAL Operating System: Embedded RTOS Video Input: 4 pairs Video Output: 2 pairs Display Speed: NTSC: 120 fields/s(4x30fps); PAL: 100 fields/s(4x25fps) Recording Speed (partition mode): NTSC: max. 30fps; PAL: max. 25fps Recording Speed (single channel mode): NTSC: max. 7. 5fps; PAL: max. 6. 25 Resolution: NTSC: 720x480; PAL: 720x576 Compression Form: Modified MJPEG ( High: 20K bytes/frame, Normal: 15K bytes/frame, Low: 12K bytes/frame) Motion Detector: 2 adjustable detecting areas for one channel, 9th grade sensitivity. Audio: 1 channel input, 1 channel output Operate mode: remote control. Alarming Recording: 4CH input, 1CH output Serching Mode: time search and recording datum search System monitoring: stop, re-back to recording mode automatically as soon as electricity is power on Power Supply: AC100V-240V, 50/60HZ Package Size: 525mmx330mmx130mm Product Size: 485mmx250mmx50mm G. W.: 4KGS N. W.: 3. 5KGS