Featuring PIR (passive infrared) detection, MINI sensors offer coverage area of 32 ft (10 m) when mounted at ceiling height of 8 ft. Sensors can be programmed for occupancy or vacancy mode, and all settings can be remotely adjusted using password-protected Android or iOS smartphone apps. Able to be used in indoor or outdoor applications, sensors feature integrated photocell. Up to 4 secondary sensors can be added to extend coverage.