OGYA Waterproof Rear Bike LED Multi-purpose Rear Bicycle Lights 100% LIFETIME WARRANTY Helmet Lamp Mount Without Tools Road Racing & Mountain Batteries Included - Fits ALL Bicycles, Trikes, Scooters 100% brand new and high quality Easy to install; Compact, convenient to carry Strong brightness, a great accessory to ensure your safety when riding at night Material: Aluminum alloy + electronic components + silicon;Powered by: 2 x CR2032 batteries (included) 3 modes of light: Full light, Slow flash and quick flash.