The IS-2260 Passive Infrared Motion Sensor provides reliable detection with pet immunity up to 40 pounds and is ideal for both residential and light commercial applications. Optimum performance is achieved by using Uniform Sensitivity Optics and Advanced ASIC-based processing. A patented black bug guard prevents bugs or dust from entering the optic chamber while increasing white light immunity. The IS-2260 can detect an intruder at the edge of the protected area as easily as an intruder directly in front of the sensor.