Aluminum and Copper Materials: The electric brushless DC motor adopts an aluminum body, all copper coil, it is heat resistant, natural air cooling. Product Features: The DC motor features low noise during operation, stable performance and long service life. Motor Specifications: The brushless DC high speed motor with 48V voltage, 2000W maximum power, 4500rpm/min rated speed, with T8F 11 teeth sprocket. Motor Controller: The controller shell is made of high quality material with groove design, which has good heat dissipation function and can protect the internal circuit to avoid thermal overload. Application: The electric brushless motor kit is suitable for DIY engine system for karts, scooters, electric bicycles, ATVs, motor bicycles, mopeds, electric off road vehicles. Item Type: 48V Electric Brushless DC Motor Material: Aluminum + Copper Product Color: As Pictures Shown Controller Box Size: 15.2×8.5×4.4cm / 6.0×3.3×1.7in Product Weight: Approx. 5900g / 208.1oz Motor Parameters: Rated Power: 2000W Rated Speed: 4500RPM. 1 x Electric Door Lock. 1 x Accelerator Pedal. 1 x Throttle Handle. After all the accessories that need to be connected are connected, finally connect the power supply and turn on the power. 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.