An ankle support includes a first portion, which is a boot-like member, and an outer member. According to the invention, there is provided a storage buffer capable of temporarily storing each of the received DMB channel signals and the specific contents signals selected by the user irrespective of whether the DMB channels are same to each other or not are outputted, among the contents signals contained in each of the DMB channel signals temporarily stored. The headsetphoneset circuits incorporate a technique that draws an extremely low supply current from two low-voltage batteries while providing clear two-way communication over a range of about 3 meters.