Motor Material: The hub DC motor adopts aluminum alloy hub, which can effectively improve the edge of the hub, which is light and high end, comfortable, and has strong bearing capacity, realizes noise operation, and allows you to fully enjoy the riding pleasure. Controller Material: The controller shell is made of metal, with grooved design, good heat dissipation, to avoid thermal overload of the internal circuit. LCD3 Display Meter: When riding a bicycle, this display meter will display many useful data on your bicycle, such as switch buttons, light switches, battery level display and other functions, the display meter has a display, you can always grasp the situation. Plastic Meter: The display meter is made of ABS plastic material, which is light in weight, strong and durable, fine workmanship, good toughness, and good waterproof performance, which provides better protection for the internal circuit and makes it more durable. Scope of Application: 48V 2000W electric wheel kit is suitable for 20 to 29 inch electric bicycles, etc. Easy maintenance, high efficiency, greatly improve riding fun, suitable for riders who like a challenge. Packing List: The bike lithium battery modified rear drive kit includes 48V 2000W motor wheel, controller, LCD3 display, a pair of brake levers, D12 power assist sensor wiring, D12 power assist sensor sheet, thumb throttle and so on. Item Type: Bike Lithium Battery Modified Rear Drive Brushless Gear Motor Kit Material: Stainless Steel, Aluminum Alloy, ABS Plastic, Metal Motor Rated Voltage: 48V Motor Rated Power: 2000W Motor Speed: About 50-52km/h Motor Brake Type: V Brake, Disc Brake Universal Motor Wheel Position: Rear Wheel. Controller Connector Type: Ordinary Connector. Controller Rated Voltage: DC 48V Controller Rated Current: 25A Controller Maximum Current: 50±2A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller Low Voltage Protection: DC 40±0.5V. 1 x Motor Wheel. 1 x Display Meter. 1 x Display Meter Bracket. 2 x Brake Lever. 1 x Power Assist Sensor. 1 x Power Assist Sensor Magnet Sheet. 1 x Steel Ring. 2 x Power Assist Sensor Tie. 1 x Thumb Throttle. 1 x Storage Bag. 1 x Line Protector. 5 x Cable Tie. 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.