Battery: 1 Li-polymer battery required. (include) Package Dimensions: 20.8 x 11.3 x 3.2 cm; 330 g Product Quantity 3pcs Colorful silver 10 LEDs, 15 seconds auto off Material Aluminum Long Time Working and Charging: Powered by built-in rechargeable battery (large capacity 500mAh), no need for AAA batteries, saving cost. Can be charged by any 5V USB device (such as USB adapter, power bank, laptop) with the included charging cable. Stylish Staff, Easy to Paste: Elegant aluminum alloy housing with built-in magnets, you can easily install this light strip in 2 ways without any tools. Way 1: Adhesively to any iron surface, such as refrigerator, grill or gun safe; Way 2: Use the included metal strip and double-sided tape to stick to any non-ferrous, clean surface. Portable, free swapping places available as you need them. Place Anywhere: Perfect smart security lighting for cabinets, corridors, porches, wine racks, bathrooms, passageways and anywhere you need lighting