With 7 colors, 18 different pictures and 2 modes to choose from, this unique bicycle wheel light will bring more fun and safety to your monotonous dark night trip whether you are alone or not. 550mAh lithium battery, long battery life; USB charging, 5-20 hours working time, saving you time to replace the battery. IP65 waterproof, can be used normally on rainy days (do not soak in water). Thanks to this bright LED light, the wheel of your bike is always visible at night, making your riding safer.Easy to install, it does not affect the bike's center of gravity: more than 95% of bikes are universal, such as road bikes, mountain bikes, BMXs, hybrid bikes and even children's bikes. Suitable hub diameter: 19mm ~ 36mm.With no speed requirement, even if the bike is parked, the bike wheel lights look just as good. You can choose flashing or steady mode using the switch. It is also a great gift for your friends and family. Explanation: 1.In the off state, short press to select the color. You have the choice between red, green, blue, pink, yellow, navy, white and RGB. Also, long press to turn it off. 2.After closing, press and hold for 3 seconds to change mode. You have a choice of 18 images and the color changes automatically. 3.Working time: 5-20 hours (Note: different lighting modes have different consumption times). 4.When the indicator light is red, charging is in progress, and when the indicator light is green, the battery is fully charged. Characteristics: * Product name: USB bicycle wheel light * Model: L05B * Size: 10.6 x 2cm * Number of LEDs: 7 RGBLED * Color: 8 colors, 18 images * Battery: 550mAh lithium battery * Fully waterproof design * Install Caliber: 19 - 36mm Installation: 1.Open the hub lumen and attach a rubber pad to the inner ring 2.Put the light on the hub 3.Tighten the screws to make them stronger The package includes: * 1 x USB bicycle wheel light * 1 x USB charging cable * 1 x professional screwdriver * 1 x Allen screw * 1 x rubber mat Welcome to our store and wish you have a pleasant shopping experience If you have any questions about our products, please feel free to contact us, we will try our best to help you, thank you very much