Bike Tail Light, Ultra Bright USB Rechargeable, Bicycle Flashing Rear taillight, LED Safety Warning Strobe Head Light, IPX4 Waterproof Fits on Any Road Bikes, Helmet and Sport Backpack USB RECHARGEABLE No CHARGING Cable Required: Don't waste your money on the battery! Charge your taillight on any device via the USB port. No cable is required, just plugging directly into a wall socket adaptor, mobile power bank or lap-top, with 1.5 hours of charging time, you can use it for 5 to 20 hours. Super Bright Light and long time using: Consisted of 10 high-quality led beams, 120Lm brightness, penetrated through fog and dust, make you are noticed by drivers long distance away; Built-in 680mAh rechargeable battery, could last about 5 hours on highest mode and 25 hours on low, do not need to charge every-day. IPX4 Waterproof: ABS+PC plastic shell, water resistant silicone lid, Highly airtight construction, ultrasonic technology, prevent splashing from any angle, easy to resist light rain, also withstands heavy rain! Suitable for outdoor camping, hiking, daily commute 6 Light Modes with Memory Function: One button to select different lighting modes, pressing the switch button each time, the lighting mode would be change. It will be off when you long press. 6 modes with gear memory function. (High/ medium/ low light, slow flash, safety warning flash, fast flash.) Easy to Install: This bicycle rear light could be mounted anywhere you want in seconds, Such as the bike frame, the back of the helmet, the seat post, scooter, stroller, wheelchair and another place where on the frame with the included rubber straps without requirement of ANY TOOLS!