IR weatherproof camera Built-in 3.6/6/8/mm lens 48pcs IR LED Effective viewing distance: 50m 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 pixels NTSC: 768 x 494 pixels Current: 500mA Minimum illumination: 0.4 lux/F1.2. STH: Image sensor: 1/3-inch Sony Resolution: 480TVL PAL: 752 x 582 pixels NTSC: 768 x 494 pixels Current: 500mA Minimum illumination: 0.5 lux/F1.2 STL: Image sensor: 1/3-inch Sony Resolution: 420TVL PAL: 500 x 582 pixels NTSC: 510 x 492 pixels Current: 450mA Minimum illumination: 0.8 lux/F1.2 SFL: Image sensor: 1/4-inch Sony Resolution: 420TVL PAL: 500 x 582 pixels NTSC: 510 x 492 pixels Current: 450mA Minimum illumination: 0.8 lux/F1.2 PTL: Image sensor: 1/3-inch Sharp Resolution: 420TVL PAL: 500 x 582 pixels NTSC: 510 x 492 pixels Current: 400mA Minimum illumination: 1.0 lux/F1.2 PFL: Image sensor: 1/4-inch Sharp Resolution: 420TVL PAL: 500 x 582 pixels NTSC: 510 x 492 pixels Current: 400mA Minimum illumination: 1.0 lux/F1.2 AGC: on/off Gamma characteristic: above 0.45 White balance: automatic Backlight compensation: on/off S/N ratio: greater than 48dB Power supply: 12V DC