Gobike Mountain Bike Warning Light?USB Rechargeable LED Waterproof Ultra Bright Bicycle Tail Lamp

• Charged by USB? automatically cut off power supply upon fully charged
• 4 modes: long light? slow flash? sudden flash? strobe
• Simple to install - Mount this bike rear light anywhere you want in seconds? such as the handlebar? the seat post or anywhere on the frame. Mount the rear bike light on the back of your helmet and you have yourself a bike helmet light.
• Practical? Reliable? and Durable. Drop-tested from 2 meter? impact resistant and built to perform. Water resistant rated to IPX4 - Protected against splashing water from any angle.
• ULTRA-BRIGHT TO KEEP YOU SAFE! 1 year warranty by GOBIKE