GET RIDING SAFETYThe bicycle light emits an eye-catching wide-angle beam that can be seen from blocks away, need not worry about being knocked over by others.What You Get:4 x Bike Safety Light(white and red), 4 x Rubber Strap, 4 x USB Cable.If you receive the bike tail light cannot be used, please email me immediately and let me serve you.IPX5 WATER RESISTANTHighly airtight construction - strong and waterproof. These bike lights are water resistant for any weather, and extremely durable.USB RECHARGEABLEThe led bike light is built in rechargeable lithium battery.Bike light comes with a CHARGING CABLE that charges from your computer, power bank or any device with a USB port.This will save you lots of money on batteries.EASY INSTALLATIONWith a convenient one-touch dismount button, you just need to slide the light on & off the mount without removing the whole mounting bracket. The silicone mount strap for Taillight is designed with four openings that tightly fit around most size handlebars and seat posts.FOUR LIGHT MODE OPTIONSThe rear bike light feature an one-touch switch with four different lighting modes depending on your preference.Bike taillights include full brightness, half brightness, fast flashing and slow flashing.EASY TO USE Hook onto your belt, running gear, reflective vest, backpack, dog collar, harness, or anywhere on your clothing. Mount to your bicycle, helmet, skateboard, scooter, stroller, wheelchair, or anywhere you can imagine. Can Be Used As a Bicycle Helmet Light Visibility is paramount to cyclist safety. This is NOT ONLY a bike tail light, it also can be used as a Bicycle Helmet Light. The rear bike light and bicycle helmet lights are largely to enhance your visibility and help others better gauge their distance from you. The Importance of Bike Tail Lights Cyclists often downplay the importance of bicycle tail lights in comparison to headlights. Cyclists without tail lights are often struck by vehicles because they are not plainly visible. Most cyclist injuries involving motorized vehicles have headlights, yet lack bicycle tail lights.