Commodore 1531
The Commodore datassette is a cheap way for storing data. Because Commodore used a standard type of cassette recorder there were very few problems with the loading of programs.
This is the third model datassette. It was introduced with the Commodore C16, C116 and Plus/4. This is the only datassette with a different connector. With a adaptor you can use the 1531 also with other Commodore computers.