Automatic sensor: Automatically turns on within 10 feet of detection, automatically turns off after 15 seconds, and does not move to help extend battery life. It only opens in the dark and when there is movement. Very energy efficient and environmentally friendly, making your lights last longer. Rechargeable battery: This motion sensor LED light is powered by a built-in rechargeable battery that you can charge via a USB cable or USB connector. Smart sensor chip with passive infrared technology, reliable performance, high sensitivity, accurate detection of your movement. Easy installation: The tape with a magnetic field can be easily fixed to the luminaire and removed from the luminaire. No tools, screws, or nuts are required. The bar's shape and compact size make it an ideal nighttime lighting for your bedroom, bathroom, stairs, hallways, kitchen, wardrobe, etc.