This camera features perimeter protection as well as cross line, intrusion, enter area and leave area detection. Based on target classification, the smart intrusion prevention significantly reduces false alarms caused by leaves, birds and lights etc. It accurately focuses on humans and vehicles. Optics: Day/night functionality Smart IR, up to 40m (131ft) IR distance Optical glass window with higher light transmittance IR anti-reflection window to increase the infrared transmittance 2D/3D DNR (Digital Noise Reduction) SD Card