Features 1、Packing List: Including 48V 1500W rear drive 20 inch motor wheel, 35A controller, LCD S866 instrument, 130X dial, D12 booster, a pair of power off brake levers, controller bag and manual. 2、Brushless Wheel Hub Motor: Aluminum alloy rim is selected and treated with fine craftsmanship, which effectively enhances the edge of the rim. Looks light and high end, with strong carrying capacity and far more comfort than other types of motors. 3、Durable Material: Controller housing is made of high quality metal with groove design, it can protect the internal circuit due to good heat dissipation, thus avoiding thermal overload. Instrument is using ABS material, it is light, strong and durable, with good toughness and waterproof performance, providing better protection for the internal circuit. 4、LCD Backlight Display: LCD S866 display meter has a variety of functions, which can clearly display the status and data. When riding bicycle, it will display many useful data on your bicycle, such as battery display, speed display, battery indicator, fault indicator, total mileage, single mileage, current speed, average speed, maximum speed, gear display, etc. 5、48V 1500W Rear Drive 20 inch Motor Kit: Suitable for bicycle lithium battery modification, DIY electric bicycle, electric vehicle, electric scooter, folding bike, etc. Easy to maintain, electric bicycle moped mountain bike modification conversion motor, high efficiency, greatly improves riding fun, for cyclists who like challenge. Specification Item Type: Electric Bicycle Motor Controller Kit Color: As Pictures Shown Weight: Approx.9900g/349.2oz Material: Stainless Steel + Aluminum Alloy + ABS Plastic Size: Controller Box: Approx. 185x84x43mm/7.3x3.3x1.7in, Meter: Approx. 80x48mm/3.2x1.9in Motor Type: Rear Drive Rotary Flywheel Motor Motor Rated Power: 1500W Motor Speed: About 45-55km/h Motor Speed: 414-487 RPM Motor Torque (n.m):71-74.6 N.M Motor Opening Size (mm): 135-142mm/5.3-5.6in Motor Matching Controller Current: 35A Motor RIM: P25D Motor Torque Arm: M14 Brake Disc for Motor: Approx. 160mm/6.3in Motor Brake Type: V Brake, Disc Brake Universal Motor Position: Rear Wheel Motor Structure: DC motor Motor Magnet Height: 35H Motor Magnet Pole Number: 46 Motor Operating Temperature: -20℃-45℃ Controller Maximum Current: 35A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller Booster: 1:5 Connector: Ordinary SM Connector Controller Wire Color Definition: 1. Black Single Big Head Cable: Waterproof Motor Cable (9pin) 2. Red and Black Single Big Head Line: Power Line 3. Red, Blue, Black, Green and Yellow Single Row Five Wire Port: Instrument Line 4. Black and Yellow Lines (two): Power off Brake Handle Line 5. Red and Black White Lines: Throttle Dial Line 6. Brown, Black and Yellow Line: Power Sensor Line 7. Black and Red Lines (two): Light Lines LCD S866 Meter Meter Function Description: 1. Display Function: Speed Display, Battery Indicator, Fault Indicator, Total Mileage, Single Mileage. 3. Communication Protocol: UART Display All the Contents of the Screen (full Display for 1S After Booting) 3.1 Display of Battery Power and Remaining Power of Bms. 3.3 Speed ??display Area Avg: Average Speed, Max: Maximum Speed, Speed: Current Speed: Unit Mp/h Km/h The Speed Signal is Taken from the Hall Signal in the Motor and Sent to the Meter by the Controller. (the Time of a Single Hall Cycle, Unit: 1ms) the Instrument Will Calculate the Real Speed According to the Wheel Diameter and the Signal Data (the Number of Magnets Required by the Motor Hall). 3.4 Vehicle Power Gear Adjustment, 0-9 Digital Display and Gear Bar Display. Package List 1 x Motor Wheel 1 x Controller 1 x Meter 1 x Instrument Manual 2 x Power off Brake Lever 1 x Throttle Dial 1 x D12 Power Assist Sensor Wiring 1 x D12 Booster Sensor Booster Sheet 1 x D12 Booster Sensor Ring 2 x Cable Ties 1 x Controller Bag 1 x Manual