The light cover is special designed for bike helmet, durable aluminum alloy construction. Compact design lets you keep it in your pocket. Take it onwherever you go. Features: Mini size for convenient carrying. Feature a one-touch switch, 3 working modes serves for different needs. Front light + Taillight +Side light can work simultaneously, great visibility and safety at night. Made of aluminum alloy material, strong reliable and shock resistant. Great waterproof performance, safe to use in rain and winter weather (Tip: avoid long time exposure in rains). Built-in li-ion polymer battery delivers extra long battery life and strong power output. USB port for quick and convenient charging. Rubber base, durable, non-slip and little hurt to your helmet or handlebar. Tool-free installation, simple and quick operation. Specifications: Material: Aluminum alloy. Color: Black. Battery: 802540 li-ion polymer battery. Battery Capacity: 2000 mAh Brightness: 300 lumens Charging Mode: USB charging Light Mode: Strong, Weak, Flash. Light distance: 200 m / 656.2 fts Product Size: 6.3 * 3.2 cm / 2.4 * 1.3 in Product Weight: 53 g / 1.9 oz Packing Size: 8.5 * 8.5 * 3.5 cm / 3.3 * 3.3 * 1.4 in Packing Weight: 87 g / 3.1 oz Package List: 1* Lamp 1* Fixing Clip 1 * Bracket 1 * USB cable Note: Front light & Taillight can work simultaneously / separately. Front light: single click for 5s to turn on, and single press for other modes. Tail light and side light: double click to turn on, and double click for other modes. When tail light is on, single click can turn front light on at the same time.