Features: 1) 4 Video input, 1 video output 2) 4 detective alarm input, 1 alarm output. 3) Support adjustment of brightness, contrast, and color. 4) Support audio and recording 5) Support PATA port interface, support 40.80.120.200GB(hard dist*2) 6) Support two recording mode: EACH and QUAD, recording frame rate and compress rate are adjustable. 7) Support motion detection recording mode. 8) Support time recording function 9) Support in the event of power failure the unit returns to it is previous mode automatically. 10)Remote controlling we can add the Remote controlling function with your requirement. 11)Save the information of disk on the PC. Technical Specification: Item Description Remarks Video Input Format NTSC/PAL Operating System None Video Input Channel 4 CH Composite Video Output Channel 1 CH Composite Display Frame NTSC 120frame/s 4*30 frame/s PAL 100frame/s 4*25 frame/s Recording Frame Rate Quad Mode NTSC Max. 30 frame/s Quad PAL Max. 25frame/s Quad Recording Frame Rate Each Mode NTSC Max. 7. 5 frame/s EACH Mode/channel Max total 30 frame/s Quad PAL Max. 6. 5frame/s EACH Mode Max total 25 frame/s Quad Recording Mode Continuous, manual, event, programmed, motion detection Resolution Dispaly NTSC720*480 Quad640*224 total Recording PAL720*576 Each Channel640*224 Compression Format Each Channel Modified MJPEG 12-20K bytes/frame Low12K bytes/frame Normal: 15K bytes/frame High: 20K bytes/frame HDD Unlimited PATA HDD Support 2 HDD Back-up HDD VCR PC Viewer Search By data time and Specified Network Yes With GS-401 Module Audio Only one channel Sensor/Detection 4 Input1 Output Motion Detection Yes Pixel: 16*32 Sensitivity: 0-9 levels