Feature: 1. Heat Dissipation Function: The controller shell is made of aluminum alloy, which can preserve the internal circuit and has good heat dissipation to avoid thermal overload. 2. Good Performance: The brush motor controller operates stably, has good performance, is not easy to damage, has a long service life, and does not need to be replaced frequently. 3. Universal: This retrofit kit is applicable to DIY electric bikes, electric tricycles and electric motorcycles, with a wide range of applications. 4. High Efficiency: This speed controller is made of premium circuit board, which is highly efficient and provides stable and sensitive speed control. 5. Easy Installation: Easy to install, the instruction label on the interface for easy installation, the controller interface can be plugged in to realize the function. Specification: Item Type: Electric Bike Controller Accelerator Kit Material: Aluminum Alloy, Rubber Gross Weight: 636g / 22.4oz Controller Parameters: Rated Power: 350W. Package List: 1 x Controller1 x Pedal Accelerator