Sound reproducing apparatus; audio speakers; earphones; headphones; microphones; voice recording apparatuses, namely, digital voice recorders; voice recognition apparatuses, namely, microphones for receiving voice data; radios, radio transmitters, and radio receivers; remote controls for controlling handheld digital electronic devices for use as a telephone, handheld computer, and audio and video player; wireless communication devices for voice or data transmission; and remote control apparatus for use with sound reproducing apparatus, audio speakers, earphones, headphones, microphones, digital voice recorders, voice recognition microphones for receiving voice data, radios, radio transmitters, radio receivers, and wireless communication devices for voice or data transmission