An apparatus and method for controlling a plurality of adjustable operational parameters of a hearing aid by the movement of an external magnetic actuator into and out of proximity with the hearing aid. The hearing aid has a microphone, hearing aid circuitry, an output transducer, and a magnetic switch, such as a reed switch, connected to the hearing aid circuitry. The hearing aid circuitry has a plurality of adjustable operational parameters and includes control processing circuity for switching between and controlling the adjustable operational parameters. The magnetic source is moved into and out of proximity with the hearing aid a selected number of times activating the magnetic switch each time. The control processing circuitry is configured to switch between the adjustable operational parameters on sequential activations of the magnetic switch for selection of an operational parameter to adjust the selected adjustable operational parameter after the activation of the magnetic switch is maintained a predetermined amount of time.