VideoSecu 4 x Outdoor IR Night Vision 520TVL Home CCTV Surveillance Security Cameras 36 Infrared LEDs Weatherproof Built-in Mechanical IR-Cut Filter Switch with 1 of 4 Channel Power Supply B1Q Built-in light sensor. Built-in mechanical IR-Cut filter switch 36 IR illuminators for night vision. NTSC signal system High Resolution camera up to 520 TVL. Built-in 6.0mm Lens Affordable day night CMOS security camera. Easy connection to TV, VCR, quad processor or DVR Package included: 4 X bullet cameras, 1 X 4 channel power supply and 4 X security warning decals