It's a light and a lock Let the light not only light The lock body is hidden with the main body inside Create an amazing sense of lightlock integration Reduce the number of equipment carried Coordinate the overall perception Reduce the burden of riding Bluetooth password pairing Securely bind device One-to-one password pairing and binding Close to the motor non-inductive intelligent unlock Make your life more intelligent Find and enter the password to match Each Bluetooth lock light has its own password To build a safe line of Intelligent sensing: Y High-concerned chemical: None Waterproof Level: IPX6 Support Dimmer: 5 - 8 Files Type:Tail Light Model Number:24720007001 Power Supply:Battery Mounting Placement:Seatpost Color: As Shown Material: Aluminum Alloy Package Contents: 1 * Bicycle Tail Light Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.