This model is a camera specially designed for the professional Day/Night surveillance. At daytime, the camera features a 520TVL Color image and at nighttime, the image is converted into real B/W mode (Color signal removed) resulting in the resolution and sensitivity greatly enhanced. The camera incorporates an Intelligent CDS sensor and mechanical day/night dual filter system so that the filter is accurately switched on and off with the image changed from Color to B/W or B/W to Color mode at 5 lux darkness. IR effective distance reaches 50 merters. Specially designed power circuit enables the camera to be operated from DC19V to DC35V maximizing the reliability of the unit from power fluctuations. This wide tolerance accepts most of unstable power supplies without failure before or after installation. It accepts either DC24V or AC24V power supply unit with no polarity input.