Motor Material: The brushless gear hub DC motor adopts aluminum alloy hub, which effectively improves the edge of the hub, which is light, comfortable, and has strong bearing capacity, realizes noise free operation, and allows you to fully enjoy the riding pleasure. Display Material: The display is made of ABS plastic material, which is lightweight, strong and durable, has fine workmanship, good toughness, and good waterproof performance, which provides better protection for the internal circuit and makes it more durable. Controller Material: The controller shell is made of premium metal, with slot design, good heat dissipation, to avoid thermal overload of the internal circuit. Scope of Application: The 48V 500W electric wheel kit is suitable for electric bikes, DIY electric bikes, electric scooters, folding bikes, etc. Easy maintenance, high efficiency, greatly improve riding fun, suitable for riders who like challenges. Packing List: The rear drive motor wheel kit includes a 48V 500W rear drive cassette flywheel motor wheel, 11A controller, LCD3 display, a pair of brake levers, 8C power assist sensor wiring, 8C power assist sensor sheet, connecting cable, storage bag. Item Type: Bicycle Lithium Battery Modified Rear Drive Brushless Gear Motor Kit Material: Stainless Steel, Aluminum Alloy, ABS Plastic, Metal Motor Wheel Type: Rear Drive Brushless Toothed Motor Motor Rated Voltage: 48V Motor Rated Power: 500W Motor Speed: About 30-32km/h Motor Speed: 265-325Rpm Motor Torque N. M Motor Opening Size (mm): Approx. 135-142mm / 5.3-5.6in Motor Matching Controller Current: 22A Motor Rim: P19D Motor Torque Arm: M14 Brake Disc for Motor: Approx. 160mm / 6.3in Motor Brake Type: V Brake, Disc Brake Universal Motor Wheel Position: Rear Wheel Motor Structure: Brushless Gear Motor Motor Magnet Height: 22H Motor Magnet Pole Number: 20 Motor Operating Temperature: Minus 20 Degree-45 Degree Controller Connector Type: Ordinary Connector (Except Motor Waterproof Connector) Controller Rated Voltage: DC 36V, 48V Controller Rated Current: 11A Controller Maximum Current: 22±1A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller Low Voltage Protection: DC 30/40±0.5V Controller Line Definition: 1. Black single wire (thick): motor 2. Five pin multi color wire: display 3. Black and red single wire: 2 power 4. Yellow, black and brown three pin wire: magnetic point assist 5. Multi color three pin wire: throttle. 1 x Motor Wheel. 1 x Storage Bag. 5 x Cable Tie. 1 x Line Protection Cover. 1 x LCD3 Display (Including Button and Connector). 1 x Display Bracket. 4 x Display Rubber Gasket. 2 x Display Mounting Screw. 1 x Display Manual. 1 x Throttle Dial. 1 x 8C Power Assist Sensor Wiring. 1 x 8C Power Assist Sensor Sheet. 2 x Brake Handle (Wire Included). 1 x Motor Wheel Installation Manual. Note that the communication protocol is the No. 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.