Built-in rechargeable battery, no need AAA batteries, saving cost. Recharged by all USB devices (like USB adapter, power bank) with charging cable included. Elegant Shell in & nbsp; with magnet inside, easy to install, tool-free, 2 ways WAY 1: Free adsorption on any metalwork surface eg refrigerator, barbecue or inside the gun, WAY 2: Stick on any non-ironwork, clean surfaces with the included metal strip and double-sided tape. Portable and free exchange places according to your wishes. PIR Motion Sensing Human movements activate, AUTO Light On / Off. Smart security lighting perfect for cupboard, hallway, veranda, bottle racks, bathroom, hallway, anywhere you need lights. 2 lighting mode: Switch to " G ": Automatically turns on when human movements are detected in the dark or at night, automatic shutdown after 20s if no movement is triggered again (Do not not light up in an environment very bright or during the day); Switch to " On ": permanently lit, can also be used as a flashlight or emergency light. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.