Check the listing for details. 20" EBike Bicycle Conversion Kit 250/1000W Electric Front / Rear Wheel Hub Motor. Color: Black, Condition: New. Listed at 188.46 USD. Note: while connecting the controller to the wires, please make sure that you connect the right colors to the controller. Otherwise, the controller may be broken. About the battery: The power and voltage of the battery（not included） you buy should be consistent with our set. When installing, make sure that the wiring is not reversed.Otherwise, it may damage the product. Note: Not waterproof, please do not drive on rainy days Features: 1. 36V 250W/48V 1000W Brushless toothed motor specification, strong and powerful. 2. Come with powerful controller guarantee big current supply. 3. Suitable for both V brake and Disc brake. 4. The maximum speed of the motor will be 30km/h.(36V 250W） The maximum speed of the motor will be 50km/h.(48V 1000W） 5. The open size of the front fork is 100mm（Front W.