Features1 Grade Material: Electric set is made of grade aluminum alloy, strong and not easy to damage, can be used for a long time, to meet your long term use needs. 2Nice Heat Resistance: The brush DC unit's body material and all copper coil give it heat resistance and can be cooled naturally by air. 3Low Noise: The electric bicycle motor controller group runs with low noise, which will not disturb others or yourself, which can bring you a better riding experience. 4Fully Equipped: The electric bike motor modification kit includes a motor, a controller, a speed control knob and a reverse switch, to offer you a thoughtful helping hand. 5Universal: Electric scooter motor conversion Kit for electric bicycles, electric tricycles and electric motorcycles, a wide range of applications, the usage needs of different types of bicycles.SpecificationItem Type:BikeReductionBrushMotorWeight: 2910g/102.6ozMaterial: Aluminum alloy, metal, rubberMotor Parameters:Rated Speed: 2950 RPM /minDeceleration Ratio: 8.9Output Power: 250WPackage List1 x Motor1 x Controller1 x Speed Control Knob Switch1 x Reverse Switch