ULTRA BRIGHT TO KEEP YOU SAFE: 240 degree wide angle visual design provides more visibility than any lights on the market. Whether you are running, walking with your dog, skateboarding or hiking, this bicycle tail light is bright enough to grab the attention of drivers, cyclists and others. And don't risk dazzling people. Secure your safety and others. IPX4 waterproofing: highly hermetic construction, more water resistant. These tail lights are water resistant and durable. The micro-USB covers are firmly closed, which allows the tail light to withstand the weather conditions when you are cycling. Do not soak them in water. USB Rechargeable: This rechargeable tail light can be charged by USB cable through computers, chargers or portable power bank. Save money and time buying and replacing batteries. With the adoption of 330mAh rechargeable lithium battery, after full charge, this USB tail light can last: 4 hours (steady light), 10 hours (slow flashing), 12 hours (SOS), 8 hours ( flashing cycle), perfect choice for cyclists who ride often EASY TO USE: Just hang this LED tail light on your belt, running gear, backpack, dog collars, harness or clothing. Ride your bike, helmet, skateboard, scooter, wheelchair, or wherever you need it. Solid silicone rubber strap designed with four openings, allowing the tail light to accommodate different sizes of handlebars and seatposts. The square plastic slot can be mounted in 2 different directions (horizontal and vertical). Perfectly meet your needs in different occasions. Package Includes: 2 x Bicycle taillights 2 x USB cables