Features： 1、Universal: This brushed motor speed controller has a wide range of applications, which is suitable for electric bikes, electric tricycles, electric motorcycles. 2、Aluminum Alloy Shell: The controller shell is made of aluminum alloy, which can protect the internal circuit, has good heat dissipation and avoids thermal overload. 3、Function: This speed controller is a brushed motor controller that provides constant speed, sensitive braking and commutation control. 4、Durable: The cables and connectors of this brushed motor speed controller are durable and ensure low defects for long term use. 5、250W: The rated voltage of the speed controller box is 12V, and the rated power is 250W which is great choice for replacing you old controller. Specification： Item Type: Brushed Motor Speed Controller Material: Aluminium alloy Gross Weight: 110g/3.9oz Rated Voltage: 12V Rated Power: 250W Undervoltage: 8.5±0.5V Turn Bar: 1-4V Package List： 1 x Brushed Motor Speed Controller