Feature:1. The rear light of the bike can warn rear vehicle. The waterproof designs and IP65 life grade waterproof make it more practical.2. USB fast charging, powerful internal circuit board, built‑in efficient and excellent LED drive and lithium battery management module.3. Easy to install, small and convenient, easy to handle, small size, light weight, do not add to the burden of cycling.4. Mounted on bicycles, helmets, skateboards, scooters, strollers, wheelchairs and so on.5. Plastic and silicone material manufacturing ensuring maximum durability.Specification:Condition: 100% Brand NewItem Type: Bike TaillightMaterial: Plastic + Silicone Size: Approx. 4 x 3.1 x 2.5cm / 1.6 x 1.2 x 1inPower Supply: 220mAh lithium batteryOne key to switch the three working modes: strobe slow flash constant on (short press will cycle), long press for a few seconds to close.Package List:1 x Bike Taillight1 x USB Charging Cable 1 x Silicone Strap 1 x Buckle 1 x Hook & Loop 2 x Round Sticker