(CNN) – Forty years ago, Sony released its first portable cassette player.
The Walkman hit the market on July 1, 1979 for $150.
It became a blockbuster hit, selling 50,000 devices in two months.
The Walkman revolutionized the way we listen to music.
In fact, the device became synonymous with all portable music players at the time.
This story was originally published on July 1, 2019