About this projectAdvanced Design. The taillight has a built-in 330 mAh rechargeable lithium battery. It comes with a charging cable to charge from your computer, power bank or any device with a USB port.Four Light Mode Options: The taillights have a one-touch switch that provides four different lighting modes depending on your preference. Including full brightness, half brightness, fast flashing and slow flashing.EASY TO INSTALL: With the convenient one-touch removal button, you can simply slide the light off and out of the mount without removing the entire mounting bracket. The silicone straps for the taillights are designed with four openings to fit snugly on most handlebar and seatpost sizes.Get riding safety: Taillights emit an eye-catching wide-angle beam that can be seen from the block without fear of being run over by others.