How to Use: The function can be realized by connecting the display socket to the instrument interface of the controller. If you want to connect other accessories, please refer to the manual. Specification: Item Type: Motor Controller Material: Aluminum Alloy and ABS Controller Box Size: Approx. 15x8.5x4.5cm / 5.9x3.3x1.8in Voltage: 36V/48V Universal Power: 500W Current Limit: 28A Introduction to the working principle and status of the dual drive controller： The dual drive controller instrument kit uses the same set of brake levers, turning handles, and reverse switches. The LCD instrument is connected to the main controller, and the main and sub controllers are connected to the dual drive exchange socket of the same battery power main controller and other sub controllers at the same time. The dual drive interactive socket of the controller is docked and plugged, and then the main controller and the sub controller are connected to their respective motors. After the identification line is opened, the entire system can operate normally, and at the same time, the two motors are controlled to run at the same speed, and brake and reverse at the same time, etc. Package List: 2 x Controller 1 x Meter 1 x Manual Note: Please allow 0.1‑1cm / 0.04‑0.4in error due to manual measurement. Thanks for your understanding.