Sensky BS041 110-240v 360 Degree Motion Sensor Switch, Ceiling Occupancy Sensor Light Switch with Time delay, Light Sensor Adjustable (6M Distance Max) AUTO ON and OFF: This movement sensor switch uses Passive Infrared technology automatically turn on the light when a moving human body (or heat source) enter into its detection area, and auto off after the delay time. Light Sensor Switch: 3-2000 LUX adjustable; When using it in daylight, please turn LUX knob to SUN position. Time Delay Adjustable: min.15sec5sec Max: 30min5min Energy Saving: 0.1W consumption (Static); 0.45W consumption (Work). This motion sensor switch not only saves your energy bill, and adds convenience to your home. Reliable: Friendly customer service with 1 Year Warranty. Please feel free to contact us with any problem.