The present invention relates to supporting media independent handover of a mobile terminal to a heterogeneous network. The conduit has an aperture defined by a continuous peripheral edge in the sidewall of the conduit. When the temperature inside the sealed housing rises due to heat from the electrical circuit component mounted in a package inside the sealed housing, a heat radiation area of the movable fin increases while keeping sealing tightness so that a heat radiation effect can be enhanced. An additional WLAN GUI may be presented indicating the WLAN access point which is connected to the mobile device and indicating which WLAN access point is downloading or uploading data to the mobile device. The filters include a plurality of adjacently positioned pleats arranged in a closed circumferential, cylindrically-shaped path, a top end cap having a central orifice capable of constricting a post on a vacuum filter cage, and optionally a molded end ring oppositely-spaced from the top end cap for engagement with the motor housing of a vacuum cleaner. In the configuration, among the two sets of inverter circuits, one set of inverter circuit is formed by a circuit connecting an organic electoluminescent device and a transistor in series, and a transistor of a memory circuit is omitted.