Get Safety: The rear bike light emits an eye-catching wide-angle beam that can be seen from the blocks, never worry about being knocked down by others. Whether running, walking with your dog , biking, skateboarding or hiking, these safety lights will keep you safe. USB Rechargeable: Stop wasting your money and never buy batteries. The bike taillight charges from your computer or any device with a USB port. Only takes 2 hours to fully charge. Super Bright with 4 Modes - Slow Flash/Alternate Fast Flash/All Lights Fast Flash/Full Brightness, the bike backlight has four light modes that you can easily switch. IPX4 Water Resistant - Highly Sealed Construction - Strong and Waterproof. These taillights are all-weather water resistant, and extremely durable. Easy Installation: With a convenient release button, you just need to slide the bike tail light on and off the bracket without removing the entire mounting bracket. The taillight silicone mounting strap is designed with four openings that fit tightly around most handlebars and seatposts.