Built-in rechargeable battery operated with high-capacity 1000mAh, no need for AAA batteries. Recharged by any 5V USB device such as USB adapter, power bank, or laptop using the included charging cable. Elegant aluminum alloy shell with magnet inside for easy installation without tools in two ways. Option 1: Freely adheres to any iron surface such as refrigerator, barbecue, or inside a gun safe. Option 2: Attaches to any clean, non-iron surface using the included metal strip and double-sided tape. Portable and easy to reposition as needed. Ideal intelligent lighting for cupboard, hallway, porch, wine racks, bathroom, passageway, or any area requiring light. Two sensor modes: Switch to "G" mode for automatic activation when motion is detected in low light, turns off automatically after 20 seconds if no further motion is detected (does not activate in bright environments). Switch to "On" mode for continuous illumination, suitable as a flashlight or emergency light. Provides 6000-6500K daylight white light with 100 lumen brightness. Comes with 1-year warranty.