The HD4D Series provides excellent color sensitivity and high resolution in low or variable light conditions. A True Day/Night camera that switches from color to black and white mode based on available light, the HD4D uses a removable infrared (IR) cut filter in color mode and an optical low-pass filter (OLPF) in black and white mode to ensure optimal image quality at any time of day. A unique Digital Slow Shutter feature increases exposure time to illuminate typically dark environments. Digital Noise Reduction (DNR) technology removes electronic static and other noise artifacts, resulting in crisp, clean images and improved motion detection performance and compression on digital and network video recorders.