Features： 1、 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. 2、Nice Heat Resistance: The brush DC unit's body material and all copper coil give it heat resistance and can be cooled naturally by air. 3、Low 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. 4、Fully 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. 5、Universal: 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. Specification： Item Type: Bike Reduction Brush Motor Weight: 2910g/102.6oz Material: Aluminum alloy, metal, rubber Motor Parameters: Rated Speed: 2950 RPM /min Deceleration Ratio: 8.9 Output Power: 250W Package List： 1 x Motor  1 x Controller  1 x Speed Control Knob Switch  1 x Reverse Switch