【SUPER OCCUPANCY SENSOR】 - 3 detectors for triple overlapping coverage to catch even small movements. 【LIGHT SENSOR ADJUSTABLE】 - 3LUX~2000LUX adjustable, the ceiling occupancy sensor can be adjusted to both work in day and night, or only work night. 【 DELAY ADJUSTABLE】 - 10sec-7min adjustable, the delay controls how long the light stays on once the ceiling motion sensor gets triggered, during the delay if motion detected, the delay will reset and start a new delay . 【DETECTION RANGE ADJUSTABLE】 - 3-12m adjustable, the sensor switch can be adjusted according to your demand. The ceiling occupancy sensor both fits for small room and large room. 【PIR MOTION SENSOR】 - Working by detecting human movement(or heat source), the motion sensor switch widely used on LED light, compact fluorescent lamp, incandescent lamp, ceiling light, exhaust fan...