1,Easy to install, easy to use 2,4mm lens (4mm,6mm,8mm Optional) 3,Auto white balance 4,Automatic backlight compensation ModelCV-DQ3142CV-DQ4142Image Sensor1/3"SONY CCD1/4"SHARP CCDEffective PixelsPAL: 512(H)x582(V) NTSC:512(H)x492(V)Horizontal Resolution420 TV LinesLenscollocate4mm lens (4mm,6mm,8mm,12mm Optional)Min. illumination0.5Lux/F1.21Lux/F1.2S/N RatioMore than 48dBSynchronizing ...