Features1Speed Control: Equipped with the motor brush controller and throttle handle grip, you will find it much easier to control the speed. 2Reliable Work: Adopting aluminium alloy housing, the brush controller enables quick heat dissipation to prevent thermal overload. 3Wider Utility: Has wide range of application on electric bikes, electric tricycles, electric motorcycles and so on, very practical. 4Comfy for Use: The soft rubber twist grip has a comfortable hand feel, thus you can fully enjoy yourself in the long time riding. 5Easy to Install: Comes with a light weight and a compact size as well, the simple installation can be quickly finished in minutes.SpecificationItem Type: Motor Brush ControllerMaterial: Aluminium alloy, rubber. Turning Diameter: Approx. 22.2mm / 0.87inRated Power: 500WUndervoltage: 420.5VHandle Bar: 1-4VPackage List1 xMotor Brush Controller1 PairThrottle Twist Grip