Name: Remote control hub light for balance car Material: ABS plastic case Size: 8.5 * 1.8cm Weight: 52g Lamp beads: 6 RGB high-brightness LED lamp beads Mode: Multi-color 20 light modes Application: Suitable for 12-20 inch bicycle / child balance bike (spoke wheel) Battery: Built-in 300mAh rechargeable lithium battery, 8 hours battery life Applicable diameter: suitable for 1.5-3cm hub diameter package: Balance wheel light (1 or 2) remote control*1 Charging Cable*1 Mounting gasket*1 Tip: 1. Due to the size of the manual measurement, the error is 1-2cm, please forgive me! 2. Please note that the display, the screen resolution, the camera angle and the light intensity can cause visual differences! 3. Due to uncontrollable factors such as transportation, if the packaging is damaged, please contact us, we are ready to offer you a free replacement service!