Features: Safe Night Riding Design: This bicycle light is very suitable for night riding. It is easy to install, the light is bright, which is easy to attract people's attention. 4 Light Mode: The Headlight and Taillight feature an one-touch switch with four different lighting modes, including full brightness, half brightness, fast flashing and slow flashing. Suitable for All Occasions: The mountain bike light has 4 lighting modes, no matter what the occasion, it can illuminate your way forward, and it is waterproof even in rainy days. USB rechargeable light: Built in 650mAh rechargeable lithium battery for each light. Life time: about 2-3 hours. Easy Installation: The silicone mount straps are designed with two openings, so it can tightly fit around many size seat posts, handlebars, seat risers, backpacks, helmets and keep lights secure and firm. 3LED Design, energy-saving LED, electricity saving, long service life. Specifications: Name: Bike Light Power source: 1 * 650mAh lithium battery (included) Lighting mode: full brightness, half brightness, fast flashing and slow flashing. Life time: about 2-3 hours Material: Aluminum alloy + engineering plastic Light color: Red, White Package size: 14X11.5X4CM Package weight: 160g Package list: 1 x Head light (white light) 1 x Tail light (red light) 2 X USB cables 2 X Silicone mounting Strap 1 X Instruction Manual