2pcs Usb Rechargeable Led Bike Tail Light(Red Light)The product is shipped based on the color or size of the main image of the product page.Size:red lightAdvanced design. The tail lamp has a 330mah rechargeable lithium battery. It comes with a charging cable that can be charged from your computer, power bank or any device with a USB port.Endurance: about 5 hoursFour lighting mode options: the tail lamp is equipped with a one touch switch, which can select four different lighting modes according to your preference. Including the first strong light mode, the second slow flash, the third explosive flash and the fourth fast flashEasy installation: with the one touch removal button, you just need to slide the lamp into and out of the base without removing the whole mounting bracket. The silicone mounting strap for the tail lamp is designed with four openings and fits tightly around most sizes of handles and seat posts.Get driving safety: the wide-angle beam of the tail light is eye-catching, and can be seen from outside the block, so you dont have to worry about being knocked down by others.