Features1Aluminum Alloy Controller Shell: The controller shell is made of aluminum alloy, which can protect the internal circuit, has good heat dissipation and avoids thermal overload. 2Comfortable Rubber Grip: The grip is made of comfortable and soft rubber material, which makes the grip more comfortable and not tired for long rides. 3Universal Use: Brushed controller and throttle grip is suitable for electric bicycles, electric tricycles, electric motorcycles, with a wide range of applications. 4Controller Parameters: Controller rated voltage is 36V, rated power is 500W, undervoltage is 31.50.5V, stable and reliable performance. 5Throttle Twist Grip Parameters: Voltage is 14V, diameter is about 22.2mm / 0.9in, three speeds are low speed, medium speed, high speed.SpecificationItem Type: Controller and Throttle Twist GripMaterial Aluminum Alloy, RubberColor: As Pictures ShownWeight: Approx. 406g / 14.3ozController Parameters:Rated Voltage: 36VRated Power: 500WUndervoltage: 31.50.5VThrottle Twist Grip Parameters:Voltage: 1-4VDiameter: Approx. 22.2mm / 0.9inThree Speed: Low Speed, Medium Speed, High SpeedPackage List1 x Controller1 Pair xThrottle Twist Grip