DAYTIME VISIBLE TECHNOLOGY - Did you know that 75 percent of cycling accidents happen in daytime? This taillight keeps you visible not only at night but also in the daytime, keeping you and your loved ones safe all the time.USB RECHARGEABLE - USB RECHARGEABLE-This taillight can be charged by USB cable via computers, chargers or portable power banks. This will save you lots of money on batteries.VERSATILE LIGHTS FOR BIKES - This bike light has been designed to offer 7 different settings that can be used for optimal road safety. The red light is commonly used as a bike taillight, blue can be used as a bike headlight, green is ideal for foggy mornings and the fast flash setting is best used when headed out for nighttime bike rides.IPX4 WATER RESISTANT - Highly airtight construction - strong and waterproof. These tail lights are water resistant for any weather, and extremely durable.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.