Excellent Grade Material: Electric set is made of excellent grade aluminum alloy, strong and not easy to damage, can be used for a long time, to meet your long term use needs. Nice Heat Resistance: The brush DC unit’s body material and all copper coil give it excellent heat resistance and can be cooled naturally by air. 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. 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. 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. Item Type: Bike Reduction Brush Motor Weight: 2910g/102.6oz Material: Aluminum alloy, metal, rubber Motor Parameters: Rated Voltage: 12V Rated Speed: 2950 RPM /min Deceleration Ratio: 8.9 Output Power: 250W. 1 x Speed Control Knob Switch. 1 x Reverse Switch. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.