describeSingle package size: 10*3*1.8 cm Product name: Bicycle USB charging super bright front light/tail light, generally white light is front light, red light is tail light Mode: six flashing modes Waterproof function: You can put the product in water Soak for a long time. Did you know that 75% of bicycle accidents happen during the day. The 168T uses the latest technology to allow you to see not only at night but also during the day. Keep you and your loved ones safe at all times. USB rechargeable. Save time on weekly battery changes. Never waste money on batteries again. It comes with a charging cable to charge from your computer, power bank or any device with a USB port. Makes it the best tail light on Amazon. Super bright for your safety. The 260-degree wide-angle visual design provides more visibility than any light on the market. Whether you're running, walking the dog, biking, skateboarding or hiking, these safety lights will keep you safe and sound. Easy to use. Hook anywhere on belts, running gear, reflective vests, backpacks, dog collars, harnesses or clothing.Package List One Piece