| 摘要 |
PURPOSE: A hands free kit for a mobile telephone is provided to enable user to hear the signal from the mobile telephone at the frequency different from broadcasting stations. CONSTITUTION: A hands free kit for a mobile telephone includes a mobile telephone(100), a car audio(200), a DC/DC converter(420), and an audio signal amplifier(430). The mobile telephone(100) communicates with other subscribers by way of stations. The car audio(200) tunes frequency bands allocated at a plurality of channels and provides radio broadcasting signal to the user. The DC/DC converter(420) receives the DC current supplied through a cigar plug(300) of the car by way of a fuse(410), and converts the received voltage to a specification voltage. The audio signal amplifier(430) receives the specification voltage from the DC/DC converter, and amplifies outward audio signal to its maximum level.
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