Bafang Mid Motor M600/G521 Controller UART/CAN Protocol Controller 36V 43V 48V18A 500W

If you need to set the wheel size and speed limit value, please let us know, otherwise, it will be shipped according to the factory default parameters.
To replace old controller with the new controller requires matching setting between the new controller and motor, otherwise it will not work properly, if you have a BESST tool can be done, if you do not have a BESST tool will not work.