Chipset: TechWell 6802B(good switchable between real time and non-realtime) Video chs: 4 real time chs Display resolustion: 640*480(PAL) 704*576(NTSC) Recording resolution: 320*240(PAL) 352*288(NTSC) Video input: BNC input(1.0Vp-p 75Ω) Audio chs: None Audio input: None Image: 10 bit, more clear, saturate, truly, color image.(SAA7130 is 9 bit) System of signal: PAL/NTSC Power consumption: Low power consumption, low heat, unnecessary use thermal sink, high stability, long lifetime. Frames : PAL: 100F/S NTSC: 120F/S HDD occupancy: Less than 300M/h/ch Power consumption: Less than 10W Work temperature: -5 °C ~ +55 °C Size: 165*90*1.6mm German Software