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Amazon.com: BONAOK Wireless Bluetooth Karaoke Microphone, Portable Handheld Rechargeable Karaoke Machine Speaker with Stereo Sound (D03 Rose Gold) : Musical Instruments
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Carbon microphone, invented in 1878 by David Edward Hughes (1831-1900), English inventor. From R. Wormell "Electricity in the Service of Man"London, 1890. Engraving Stock Photo - Alamy
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