Cool and Fascinating Lighting Effects Design & Multi-Purpose Use- This bike laser taillight has an unique spider lighting effects design. Very cool and fascinating. It also has multi-functions. It is not only can be use as bike taillights but also can be used as laser pointer, pet toy. Our premium bike back lights with full color gift box are perfect for birthday presents, Christmas gifts and easter gift ideas for kids and adults, men and women, boys and girls Safety Function- Our bicycle rear lights are bright which is eye-catching to enhance maximum visibility on the road for your cycling safety. It is hard to shake it off even if you run on an uneven road at night. Perfect laser tail light for night cycling. Easy to Install and IPX-5 Waterproof- Installed on nearly all bicycles, such as foldable bike, road bike, mountain bike and so on. This bicycle rear lights are simple to install. No tools needed. Good sealing performance and water-resistant (But cant soaked in water for a long time). USB Rechargeable Battery- This Bike Taillight use upgraded USB rechargeable Li-ion battery. Fast charging, Long working! Simply recharge it with connecting to notebook, computer, or other USB power source. Energy conservation and environmental protection. No need to buy new batteries! Save your money!