USB Rechargeable: Stop Wasting Your Money and Never Buy Batteries. The bicycle tail light charges from your computer or any devices with USB port.Only takes 2 hours to fully charge.Easy to Install: Horizontal or Vertical Mounting, 360 rotation mountable cycling blinker installs and flexible detaches around any handlebars, post, frame or helmet in seconds with no tools required.Ultra Bright to Keep Your Safe: 260 degree wide angle visual design provides more visibility than other lights.what's more , The COB lamp beads produces super bright light to enhance maximum visibility on the road for your cycling safety.Multiple Modes & Waterproof: The bicycle light is red & blue, lasting up to 2-4 hours depending on the mode you use. Weather tight design ensures all condition use.The Bicycle LED Light is brilliant illumination widely used for mountain bike headlight, taillight, helmets, backpacks, belts, scooters, baby stroller, walking stick, wheelchairs.It is SUPER BRIGHT, LIGHTWEIGHT, WATERPROOF,ENERGY SAVING, DURABLE Enjoy cycling with a peace of mind.