| CPC H04M 19/08 (2013.01) [H04H 20/76 (2013.01); H04M 9/001 (2013.01)] | 17 Claims |

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1. An audio device, comprising:
a charger, coupled to a transmission line and configured to generate a charging voltage; and
at least one audio broadcaster, coupled to the charger through the transmission line,
wherein the charger transmits the charging voltage to the at least one audio broadcaster through the transmission line, the charger transmits first data to the at least one audio broadcaster through the transmission line, and the charger receives second data from the at least one audio broadcaster through the transmission line,
wherein the charger carries the first data onto the charging voltage for transmission to the at least one audio broadcaster, and the at least one audio broadcaster carries the second data onto the charging voltage for transmission to the charger simultaneously.
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