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.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.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.Ultra Bright & 5 Modes:Red Brightness (last up to 2 hours)Red Strobe (last up to 4 hours)Blue Brightness (last up to 2 hours)Blue Strobe (last up to 4 hours)Red & Blue Strobe (last up to 3 hours)USB Rechargeable:Charges from your computer or any devices with a USB portBuilt in high quality rechargeable lithium batteryJust needs 2 hours to fully chargeEASY TO USE:Find the device with a USB port (laptops, computers or your cell phone plug is ideal) and plug it in for 2 hours or less.StepWe've included everything, even split-second setup instructions. Simply connect it to your bike frame, fork, post (including most Aero tubes), handlebar, saddle bar, stay, bracket, rims or helmet. It fits snugly and stays put Choose the lighting setting that's right for you, then switch at any time.Enjoy knowing you can safely bicycle in any lighting condition for 4 - 12 hours.IIf you want to use it somewhere else,unclip and move to the next location. Includes multiple sized silicone rings for the colour: red+Blue lightMaterial: plasticsize: 8.7 x 2 x 3cmPackage Contents:2 x Bicycle Tail Light2 x Rubber Strap2 x USB Cable2 x User ManualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.