Bicycle Parts modname=ckeditor ADVANCED DESIGN. The Tail Light is built in 650 mAh rechargeable lithium battery. It comes with a CHARGING CABLE that charges from your computer, power bank or any device with a USB port. 5 LIGHT MODE OPTIONS: The Tail Light feature an one-touch switch with four different lighting modes depending on your preference. Include Red light full brightness, White light full brightness, fast flashing, slow flashing, Red and White light flicker alternately 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. The silicone mount strap for Taillight is designed with four openings that tightly fit around most size handlebars and seat posts. ADVANCED SILICONE MOUNTING STRAP: The strap is elastic enough to fit many kinds of bikes and can be mounted on any part of the bike. GET RIDING SAFETY: The tail light emits an eye-catching wide-angle beam that can be seen from blocks away, need not worry about being knocked over by others.Super waterproof, no need to worry about heavy rain and other bad weather.