Day/night functionality Smart IR, up to 50m (164ft) IR distance Optical glass window with higher light transmittance IR anti-reflection window to increase the infrared transmittance 2D/3D DNR (Digital Noise Reduction) Built-in Mic Ultra 265, H.265, H.264, MJPEG ROI (Region of Interest) ONVIF Conformance Wide temperature range: -30°C ~ 60°C (-22°F ~ 140°F) Wide voltage range of ±25% IP67