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