Features M-JPEG compressed format with the optimal image quality , code flow ratio and higher stability. High/standard/low record quality, support record modes like manual, motion and event trigger which extend the recording time. Time search playback, event search playback , reverse X6 and forward fast (X1; X2; X3) replay function. Brightness ,contrast and color are adjustable for each channel. Enabled in RS485 PTZ control. Automatic overwirte or information reminding function in case of insufficient hard disk space. ◇ Connect one IDE interface(available for 1000G large-capacity hard disk). Electron dog function: Automatically restore to recording status in case of accident power-off/power-on. USB backup, search, play, save and snapshot by event (optional). Enabled in external event trigger record, four groups of external alarm input, may start alarm channel record simultaneously (optional). Remote controller and VGA is optional. Technology specification Video signal system PAL/NTSC Video input number 4 譈NC Video output number 1?BNC 1?VGA Horizontal resolution(play) PAL: 720?76 NTSC:720?80 Horizontal resolution(playback) PAL: 640?72 NTSC: 640?24 Detect image display rate PAL:4?5 fps NTSC:4?0 fps Record display rate ( Dividing mode) PAL: 25/4 fps at most NTSC: 30/4 fps at most Record display rate(Compress mode ) PAL: 25/4 fps at most NTSC: 30/4 fps at most Record mode Continuous record/alarm record /no record Screen setup Time/Date setup Event recording 63 times/HD Motion detection Yes Buzzer Yes Image loss alarm Yes Key locked Yes Password protection Set 6 numbers in one batch Power source input DC 12V/4A Dimension 315(L)?75(W)?8(H)mm