Besides intruders, snow can interfere with the regular operation of the detector. It may stick to anti-masking sensors, block their field of view, and cause a false alarm. Hood protects MotionProtect Outdoor during a snowfall. Anti-masking sensors react to spray paint. But an extended exposure to heavy rain may create interference. Hood protects MotionProtect Outdoor during a thunderstorm to avoid any disturbance related to false alarms.