Technical parameters:  1.Playback and recording can operate at the same time 2.Full screen, PiP, Zoom? ,Zoom?,Zoom? 3.Dynamic time divide function 4.Image optional:1,4,9, 5. Screen display: date, time alarm condition, video loss, camera name. 6.High resolution:512?12(PAL),512?64(NTSC),high image quality 7.16?2 full screen video motion alarm, day/night selectable. The objective position, dimension, sensitivity and motion time can be selectable to setup. 8.Auto check the speed of recording , auto check the synchronization of quad processor and recording 9. Independent mate monitor display, independent assistant monitor display. 10.Program information can auto storage when power-off 11.Power supply: DC12v/2.5A