Rechargeable Design: The Tail Light is built in rechargeable lithium battery. It comes with a charging cable that charges from your computer, power bank or any device with a USB port.7 Light Mode: The Tail Light feature an one-touch switch with 7 different lighting modes depending on your preference. Include full brightness, fast flashing, slow flashing and strobe .Easy Installation: With a convenient one-touch dismount button, you just need to slide the light on & off the mount without removing the whole mounting bracket.Universal Fit: The silicone mount strap for Taillight is designed with four openings that tightly fit around most size handlebars and seat posts.Riding Safety: The tail light emits an eye-catching wide-angle beam that can be seen from a long distance, need not worry about being knocked over by others.