Description: 【Premium Material】: Made of high quality material, wheel valve caps light is lightweight and reliable, waterproof, suitable for all kinds of weathers. 【Package Included】: 2 LED Valve Bike Lights, Great for you to use daily, you can also share them with your bicycling partners, friends and families. 【Automatic Function】: LED wheel light operates by bike Vabration, lights will turn on when bike is moving, turn off when stop, you don't need to do yourself, you can have pleasant cycling trip. 【Function】: The bike lights increase the night time and inclement weather visibility to ensure experience. Size 6.4cmx1.7cm/2.52inchx0.67inch. 【Easy to Install】: The wheel light can be easily installed and removed, for most bike motorcycle car. Specification: Material: ABS Size Chart: 6.4cmx1.7cm/2.52inchx0.67inch Package Includes: 2 LED Valve Bike Lights(6 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.