• This tail light is powered by built-in lithium battery, it's very convenient and ecological. It charges via any USB device
• No wiring required, simple installation
• Fits for most electric scooters, bicycles, and electric vehicles

Specifications:

• Material: ABS+Metal
• Clamp opening: maximum 65mm
• Tail light battery capacity: 900mAh (included)
• Remote control battery: 150mAh CR2032 button battery (included)
• Voltage: 5V