<p>A toothbrush (100) may include an audio component (140) configured to operate as a microphone to receive an audio signal in a first mode of operation and to operate as a speaker to output the audio signal through the body (148) of the toothbrush (100) in a second mode of operation. Another toothbrush (100) may include a motor (271) for powering one or more moveable elements (227) and a processor (392) to monitor and maintain a variable, such as the motor speed or voltage applied, associated with the motor (271). Another toothbrush (100) may include a single operation mode button (FIGS. 13A-13C) to change a mode of operation of moveable elements (227) on the toothbrush (100) and audio signals transmitted through an output (148) of the toothbrush (100).</p>
