Technology: Selected and processed by fine technology to effectively enhance the edge of the wheel, which is light and high end feel, with strong bearing capacity and comfort far more than other types of motor, realizing noiseless operation and allowing you to fully enjoy the fun of riding 2. Material: Made of high quality metal with flute design, it protects the internal circuit from thermal overload due to its excellent cooling function 3. Functions: With a variety of functions, can be used as a driving computer, and control the entire electric bicycle system after conversion, compatible with 36V and 48V voltage; Color display makes it easier to view data on the panel, such as remaining battery, current speed, average speed, maximum speed, clock, total one way distance, guaranteed cycling mileage 4. Suitable for: Suitable for bicycle lithium modification, DIY electric bike, electric bike, electric scooter, folding car, etc. Easy to maintain, electric bike mop bike mountain bike conversion motor, high efficiency, greatly improve the fun of riding, suitable for cyclists like challenges 5. Available: 5 rings spoke sizes are available. 20in rims spokes, 24in rims spokes, 26in rims spokes, 27.5in rims spokes, 28 /29in rims spokes and 700C can be shared. Control and Setting Functions: Power Switch Control, Headlight Switch Control, 6km / H Inching Control, Wheel Diameter Setting, Maximum Speed Setting, Idle Automatic Sleep Time Setting, Backlight Brightness Setting, Voltage Level Setting and Pas Connection. Display Functions: Speed Display, Boost Level Display, Power Indicator, Fault Prompt, Total Mileage, Single Mileage, Headlamp Display and Single Driving Time Display. Item Type: Electric Bike Conversion Kit Material: Stainless Steel, Aluminum Alloy, Plastic Commodity Size: Controller Box Approx. 8 x 5 x 3cm / 3.1 x 2 x 1.2in, Instrument Approx. 11 x 6cm / 4.3 x 2.4in Motor Type: Front Drive Motor Motor Connector: Waterproof Connector (9pin) Rated Voltage of Motor: 48V Rated Power of Motor: 250W Motor Speed: About 25-28km / H Motor Speed: 207-270 RPM Motor Torque n. M: 29-31.2 N. M Motor Opening Size (mm): Approx. 100mm / 3.9in Motor Matching Controller Current: 15A Motor Rims: P19D Motor Torque Arm: For M 14 Applicable Brake Disc of Motor: Approx. 160mm / 6.3in Motor Brake Type: V Brake / Disc Brake General Motor Position: Front Drive Motor Structure: Brushless Level Hub Motor Height of Motor Magnetic Steel: 22h Number of Magnetic Steel Poles of Motor: 20 Operating Temperature of Motor: Minus 20°-45° Rated Voltage of Controller: DC 36V / 48V Maximum Current of Controller: 15A Controller Speed Setting: 1-4.2V Controller Brake Input: Low Level Controller BOOSTER: 1:5 Controller Line Color Definition: Black Single Big Head Wire: Waterproof Motor Wire (9pin) Red and Black Single Large Head Cable: Power Cable Red Blue Black Green Yellow Single Row Five Wire Port: Instrument Line Black and Yellow Lines (2): Power off Brake Handle Line Red Black White Line: Throttle Dial Brown Black Yellow Wire: PAS Boost Sensor Wire Black and Red Lines (2): Light Lines. 2 x Outage Brake Handle. 1 x Throttle Dial. 1 x Boost Sensor. 1 x Motor Extension Cable. 40 x Spoke Nut Hat. 1 x Spoke Installation Tool. The subject is compatible with the communication protocol of the product. 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.