Description: Features: Brand new and high quality Fits virtually all sizes of road bikes and can be mounted anywhere you like. These taillights are water-resistant and extremely durable. Multifunctional: Lightweight and durable. It can also be used as a helmet light, backpack light, warning light, and more. IP65 rated waterproof material to ensure safe use even in heavy rain. Conveniently rechargeable with a micro-USB cable. Quick tool-free mounting. Installs easily on handlebars, seat posts, helmets, can also be clipped onto your running clothes, reflective vest, backpack, or anywhere. Specification: Material: ABS Color: Black+White Waterproof Rating: IP65 Power Supply: USB Charging Size: Approx. 4x4x2.3cm(1.57x1.57x0.90in) Quantity: 1 Pc Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3cm error due to manual measurement. Make sure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1 x Bicycle Taillight (other accessories demonstrations in the picture are not included.)