A system, device, and method for time-domain equalizer training determines the TEQ order and TEQ coefficients by applying the multichannel Levinson algorithm for auto-regressive moving average modeling of the channel impulse response. The nose is configured to receive a portion of a prophy angle. The activating member is operatively engaged to the pill container to activate the sound player. A mirror mounting button is provided on either the housing or the cover for mounting a rearview mirror assembly to the mount.