Abstract: An activity meter includes a body movement detecting unit, a display unit, a target activity amount acquiring unit, an accumulated activity amount calculation unit, an excess activity amount calculation unit, a converted value calculation unit that calculates a converted value representing an excess amount of activity by dividing burned calories corresponding to the excess amount of activity by a unit calorie count, where a standard calorie count of a predetermined food is the unit calorie count, and a display operation control unit that controls a display operation of the display unit such that the display unit displays a measurement result using the converted value.

Abstract: A case for a powered toothbrush comprises a housing having an interior for receiving a powered toothbrush, and a cover, wherein the cover substantially obfuscates the interior but is sufficiently light-transmissive to communicate the presence of an indicator from within the interior. Also provided is a powered toothbrush and case system.