This Sony "Walkman" portable tape player dates from the early 1980s. Originally introduced in 1979 as the “Soundabout,” two people could listen simultaneously while a small microphone permitted them to converse without removing their headsets. Powered by a 9-volt battery, the recorder sold well until the decline of the cassette format in the mid 2000s. Until the middle of the twentieth century portable recording equipment could be quite heavy. The introduction of small transistor radios in 1954 marked a new era in portable entertainment. Philips’ invention of a compact recording cassette in 1962 provided a convenient medium for music distribution.
For more information about the Object of the Day, check out this post on the Smithsonian Music blog.