... Scan CCD, PTZ, IP66, built-in OSD menu Mega Pixel High speed dome camera: adopts 1/3'' Type Solid state progressive Scan ... opens automatically. In this way, the speed dome camera can work effectively under both high/low illumination conditions.Unique Structure:The unique ... . When it zooms in, the pan/tilt speed slows down smoothly, which is easy for surveillance. Mega Pixel High Speed Dome IP Camera