Headphones; Megaphones; Microphones; Audio cassette recorders; Audio speakers; Computer docking stations; Computer peripheral devices; Electrical pickups for use with musical instruments; Loudspeakers with built in amplifiers; Microphone stands; Microphones for communication devices; Pickups for telecommunication apparatus; Smart home hubs using artificial intelligence comprised of voice-activated speakers, computer hardware, and downloadable software for controlling networked devices in the ...