When I was a youngster I was visiting my cousins Christy, Jeff and Darryl. They had one of the first Sony Walkman cassette players. If I remember correctly it had an accessory battery pack. They had a tape of Foreigner "4".
The first song I ever heard on a Walkman was "Urgent." It was awesome. It was like I was standing right in the middle of the band as they played. Up until that time I had only heard music played on scratchy LPs or from a transistor radio.
A cassette player that fit in the palm of your hand!?! With stereo!??!! That was the coolest thing ever.