Model VT-2004AIR VT-2004BIR VT-2004CIR Signal system PAL/NTSC Image sensor 1/3 SONY CCD 1/3 SHARP CCD 1/4 SHARP CCD TVL 480TV Line 420TV Line 420TV Line Lens 6mm,8mm,12mm,16mm For selection IR-LED 12PCS IR distance 25m Minimum Illumination 0.8Lux S/N Ratio More than 52dB video output Composite Video Output(1Vp-p 75ΩTerminated),Y/C Separated Temperature operation -20°C to +50°C Power supply DC 12V(+/-10%) CCD Dimension 38mm*38mm/2P