If it does not match, it will easily damage the machine. 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. 36V 500W LCD ebike conversion kit for rear wheel 1. 36V 500W motor 2. Spokes and aluminum circle 4. 36V 500W controller 5. Connectors and fuse 10. LCD (about Speed and power) 11.