Cassette changers in 1982 were a relatively new and expensive product. They allowed you to listen to several tapes in a row without having to manually change them. This was especially convenient for people who wanted to listen to music while driving or working.
1982 Cassette Changer Features:
Capacity: from 6 to 12 cassettes
Loading type: front or vertical
Functions: automatic playback, programming, track search
Price: $500 to $1000 (1982 US dollars)