Description As a safety warning light, this bike tail light is bright with a wide angle beam, compact, easy to carry, and most importantly, not expensive, very worth buying. Takes 2 hours to fully charge and has a Runtime of 3-10 hours. Fits for 12-34mm tube. Feature - Color: red, blue, white - Material: plastic - Size: 8.5*2.5cm - 12 lumens bright LED light with 3 Lighting modes: flashing, constant and super bright. Low power- USB charging with auto powr off, protect you bike light from over charging. - Rechargeable lithium polymer battery, takes 2 hours to fully charge and has a Runtime of 3-10 hours.consumption and long life - Waterproof and shockproof, ABS polymer rubber seals allows for protection from shocks, drops, and rainy days - Easy to install and remove, fits for 12-34mm bike tube. Packing content: 1*lightNote: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding 2. The color may vary depending on the display. Please understand Note: Hello, please pay attention to your shipping address when purchasing products. If your receiving information (such as name, street, house number, doorbell/email without name) is incorrect, the order will not be delivered correctly.)