An apparatus associated with a power driven wheelchair and a method of calibrating one or more operating parameters of a power driven wheelchair are disclosed. The apparatus comprises one or more input devices (64) for selective activation； and system controller (32). The system controller comprises a mounting portion for mounting the system controller to the power driven wheelchair； a display device (66)； a first non-volatile storage device (70) storing one or more sets of calibration parameters associated with operation of the power driven wheelchair and a microcontroller. The microcomputer (82) comprises logic that controls display of the interactive screen on the display device； and logic that controls selection and modification of one or more calibration parameters stored on the first non-volatile memory device in response to activation of one or more input devices.
