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Switching devices for automatically interrupting entertainment audio signals to receive incoming communication signals; adapters for automatically switching signals between mobile communication devices and electronic devices having audio output; adapters for interfacing headphones and microphones with mobile communication devices and electronic entertainment devices having audio output; electronic switches; headphones; wireless headphones; microphones; wireless microphones; headsets; wireless headsets; wireless transmitters; wireless receivers; radio frequency transmitters; radio frequency receivers; IEEE 802;15;1 transmitters; IEEE 802;15;1 receivers; audio device and IEEE 802;15;1 telephone adapters; wireless personal area network adapters; wireless remote controllers; radio frequency remote controllers; IEEE 802;15;1 remote controllers; electrical and electronic plugs; cable adapters; plug adapters; plug connectors; USB cables and adapters; mobile power cords; power cables; direct current adapters and converters; alternating current adapters and converters; docking stations for portable digital media storage and playback devices