Walkman

A Walkman was a device developed around the 1960s. It would make sound if someone put a tape in it. (PROSE: Nuclear Time)

Later Walkman models were capable of playing CDs. In 2002, Ace acquired a CD-Walkman from Paul Tanner, which she took with her to 1944. There, it was acquired by Nazi scientists, who developed laser technology from studying it, enabling Germany to win World War II. (AUDIO: Colditz)