Installed in the center of the wheel, won't affect the center of gravity of the bicycle.

• No speed is required, will constant lighting when power on

• Separate design, easier to install, and suitable for mountain bikes and children's balance cars

• Waterproof design, you can usually ride on rainy days

• Used to install children's bike wheel hubs for safe driving at night

• Easy to install and remove. Automatically color changing

Specification:

• Diameter not exceeding 30mm is available

• Material: PC

• Battery Capacity: 300mAh Li-Battery (USB rechargeable)

• Installed Diameter: Less than 30mm (Especially recommend for kids balance bikes)

• Work Time: 8-12 hours

• Item size: 82 * 82mm / 3.2 * 3.2in