Product Package content: 1 bicycle wheel lamp 1 x USB charging cable. 1. [7 colors and 15 modes]: Colors and modes are controlled by just one power button on the light. Long press the power button to turn the lights on and off. Just press the button to change the light color and modes. Available colors: red, green, blue, navy blue, pink, yellow, white and automatic 7-color changing mode. It is very convenient to choose your favorite color and mode from a single color flash, a color steady light and a 7-color automatic changing mode. 2. [Safe and Cool Light]: Made of high quality, environmentally friendly material, the bike wheel and frame lights are durable and lightweight. Colorful bicycle tire lights for cycling decoration and safe driving. Good visibility from all directions gives you excellent night driving. Multi-colored bicycle wheel lights, compatible with almost all bicycles, including racing bikes, mountain bikes, hybrid bikes, triathlon bikes and touring bikes. Waterproof, ultra bright light works well on rainy or snowy days. 3. [USB rechargeable]: The wheel hub lights are rechargeable via USB, no battery required. Bicycle wheel lights suitable for hub diameter less than 30mm, please measure the thickness of your hub before buying. About 2 hours can be fully charged, in flashing mode the working time can be up to 8-12 hours. When the indicator light is red, the battery is being recharged. When the indicator is green, it means the battery is full. 4. Easy Installation and Removal: Great bike lights with amazingly easy installation and removal. The cute safety tire lights can be firmly attached to the bike within a minute. Select foam hub pads (included) to glue onto the inner ring of the lamp, orbit the light in the center of the hub, and buckle up. No other tools required.