Features: 1. Safety Warning Taillight - As a bicycle safety warning light, it is bright, compact, easy to carry, and most importantly, not expensive, well worth buying.2. USB Rechargeable & Save Your Money – Never Waste Your Money on Batteries again! Save the Hassle to Replace Batteries Every Week! They charge from your computer or any device with a USB port.3. Easy To Install And Remove - Leave your screwdrivers in the toolbox, and detaches in under 2 seconds with NO tools required. It can be mounted almost anywhere.4. Waterproof And Shock Resistant - IPX4 Waterproof grade.5. Suitable for professional or casual bicycle rider night riding. -With Charging Cable 🚩Buyer's Note: Please allow 1-3mm（0.039in) differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding. If you have any questions , please feel free to contact us. Your comment is very important to us, please don't give us a negative feedback, we'll solve all your problems, thank you for your support. You could contact me directly if you need wholesale, we will give you the best price. Thank you for your purchase!