Simple to install, no hard-wiring. With adhesive pads and a built-in magnet, you can stick on anywhere you like. Powered by 3PCS AAA batteries (not included) for coreless installation. To provide you with illumination in areas that have limited or no access to electricity. Auto-on within 10 feet, auto-off after 15 seconds of no motion detected helps prolong battery life. It will turn on only when it is dark and when motion is detected.