It is designed with an external battery plug for easy use. Centralized control of the entire scooter system, including speed control, bluetooth module, component coordination and safety monitoring This scooter bluetooth control card is a perfect replacement for Nineboot ES1 ES2 ES4 electric scooter control panel. Made of metal material, it is durable and will not be damaged. Easy to install, no need to enable controls to use directly Describe: This wheel bluetooth dashboard is perfect as a direct replacement for the Nineboot ES1 ES2 ES4 electric scooter control panel. The installation is simple, and it can be used directly without an active control panel, which is convenient to use. It can control speed control, bluetooth module, component coordination and safety monitoring, it is a central control panel. It is designed with an external battery plug that you can use to replace worn or damaged control boards. The outer shell is made of metal material, which also protects the internal parts, so it can be used for a long time. Specification: material: metal Color: Blue White Dimensions: 15x5x5 cm furniture item ES1 ES2 ES3 ES4 Alternative Package Contents: 1 x Scooter Control Panel 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.