Description: The compact and powerful rear bike light can ensure the safety of people and others, and ensure that other road users can see you and your bike [9 kinds of light selection] 9 kinds of light modes can meet the best visibility in day and night. High light for 4 hours, low light for 10 hours [Easy installation] It can be easily loosened and fixed by using the matching bracket (bracket not included). It can also install various sizes of seatposts, handlebars, risers, backpacks, helmets and telescopic chairs according to your preferences [Waterproof] Waterproof, even in snowy and rainy days, it can prevent water from splashing from any angle Using high-quality ABS plastic, multi-purpose, compact and portable, strong and durable. Taillight battery capacity: 400 mA Specification: Material: ABS Size(LxWH): Approx. 42.5x32x23.4mm/1.67x1.26x0.92inch Package Includes: 1 Piece Bike Warning Light 1 Piece USB charging cable(2 Pack) Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. This tail light does not have a bracket, it needs to be used with a WEST BIKING cushion that can be fitted with a tail light or a bracket suitable for the tail light buckle.