Weatherproof IR camera Built-in 3.6/6/8/12mm lens Quantity: 30pcs IR LED Effective viewing distance: 70m TV system: PAL/NTSC Minimum illumination: 0 lux (LED on) The description of different chips are as follows: HQ: Resolution: 520TVL PAL: 752 x 582 NTSC: 768 x 494 Current: 450mA Illumination: 0.4 lux F/1.2. STH: Image sensor: 1/3-inch Sony Resolution: 480TVL PAL: 752 x 582 NTSC: 768 x 494 Current: 500mA Illumination: 0.5 lux F/1.2 STL: Image sensor: 1/3-inch Sony Resolution: 420TVL PAL: 500 x 582 NTSC: 510 x 492 Current: 450mA Illumination: 0.8 lux F/1.2 AGC: on/off Gamma characteristic: above 0.45 White balance: auto Backlight compensation: on/off S/N ratio: greater than 48dB Power supply: 12V DC