Features: brand new and high quality USB Rechargeable:The bicycle taillight is built on a 1200 mAh large capacity rechargeable lithium battery. After fully charged, it can work continuously for 50 hours. 5 Light Mode Options: The bike tail light has 5 different light modes: Full Bright, Fast Blink- and Slow Blink-, Marquee A, Marquee B, Breathing Light. Flashing modes make you visible even on the busiest roads or dark routes. Simple Installation- The silicone taillight strap fits most handlebars and seatposts. And it is very widely used, including helmet, stroller, scooter, wheelchair, skateboard,backpack, dog collar, etc. Excellent Safety: The IPX5 waterproof bike rear light can be used in rainy days. This bicycle rear light is equipped with 9 pieces 2835 LEDs that provide super bright red light, make your ride safer. Buy with Confidence: If you have any questions, don'for t hesitate to contact us,and we will try to serve for you until you are satisfied. Specifications: Material:PC Mode: 5 Modes Working Voltage: 3.7V Waterproof: Ipx5 Battery: 1200Mah Working Time: Normally 50-200 Hours (depends On Different Modes) Package Includes: 1x Bike Tail Light, 1x USB Cable. note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!