Earphones; Headphones; Intercoms; Megaphones; Smartphones; Smartwatches; Audio cassette recorders; Computer cameras; Computer keypads; Computer printers for printing documents; Digital door locks; Digital video cameras; Facsimile machines; Game cameras; Laptop computers; Photo-copying machines; Video cameras; Video recorders; Portable and handheld digital electronic devices for recording, organizing, transmitting, manipulating, and reviewing text, data, image, and audio files