85183000Microphones and stands therefor; loudspeakers, if mounted in their enclosures; headphones and earphones, if coupled with a microphone, and sets consisting of a microphone and one or more loudspeakers; audiofrequency electrical amplifiers; electric seem amplifier established headphones and earphones, if combined with a microphone, and sets consisting of the microphone https://andresyeasn.blogscribble.com/31022811/technology-and-gadgets-youtube-channel-an-overview