Portable and handheld digital electronic devices for recording, organizing, transmitting, manipulating, and reviewing text, data, image, and audio files; mobile phones; cameras; personal digital assistants; portable and handheld digital electronic devices for recording, organizing, transmitting, manipulating, and reviewing audio files; laptop computers; tablet computers; interfaces and peripheral devices for computers and handheld digital devices; USB (universal serial bus) hardware; electric...

audio amplification equipment