A frame including an opening, a sound outputting unit arranged inside the frame, and an elastically deformable packing attached to the frame and projecting outward from the frame to be formed into an annular shape are provided, and they are configured to be stored in a tire storage unit including a storage concave portion opening upward in which a spare tire is stored in a state in which the packing is pressed against a rim portion of a wheel below a disk portion of the wheel of the spare tire. According to this, two spaces enclosed by the packing, each portion of the wheel, and the tire storage unit are formed, so that sound may be output from a speaker unit in an excellent manner and it is not required that the speaker unit be removed from the tire storage unit when the spare tire is stored in or removed from the tire storage unit.
