Packing List: The rear drive kit for bike lithium battery modification includes 48V 500W rear drive motor wheel, 11A controller, LCD7U instrument, a pair of brake levers, 8C power assist sensor wiring, 8C power assist sensor boosting sheet, connecting cable and storage bag. Rear Drive Motor: The brushless gear hub DC motor adopts an aluminum alloy hub, which effectively improves the edge of the hub, which is lightweight, high end, comfortable, and has a strong bearing capacity, enabling noise free operation, allowing you to fully enjoy the riding pleasure. Controller Housing: The controller shell is made of high quality metal, with slot design, good heat dissipation, to avoid thermal overload of the internal circuit. LCD7U Panel: The meter is made of high quality 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: 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 cycling enthusiasts who like challenges. Item Type: Bike lithium battery modified rear drive motor wheel kit Material: Stainless steel, aluminum alloy, ABS plastic, metal Motor Wheel Type: Rear drive motor wheel (waterproof joint) Motor Rated Voltage: 48V Motor Rated Power: 500W Motor Speed: About 30-32km/h Motor Speed: 265-325 Rpm Motor Torque N. M Motor Opening Size (mm): 135-142mm / 5.3-5.6in Motor Matching Controller Current: 22A Motor Rim: P19D Motor Torque Arm: M14 Brake Disc for Motor: 160mm / 6.30in 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°-45° 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 wire color definition. Black single wire (thick): motor 2. Multi color wire(5pin): meter 3. Black and red single wire: Powerx2 4. Yellow, black and brown wire(3pin): magnetic point assist 5. Multi color 3 hole line: throttle 6. Multi color 2 hole line: brakex2. 1 x Motor Wheel. 1 x Storage Bag. 5 x Cable Tie. 1 x Line Protection Cover. 1 x LCD7U Meter (Including Bracket and Connector). 1 x Throttle Dial. 1 x 8C Power Assist Sensor Wiring. 1 x 8C Power Assist Sensor Sheet. 2 x Brake Handle(Wire Included). Pay attention to communication protocol. 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.