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 first model datassette. It was introduced with the PET and CBM range. It can be used on every Commodore with a datassette connection. For the 264 range you need an adapter.
The write LED on this datassette is an modification.

CBM, VIC20, C64, C128

Compact Cassette

135 x 200 x 60 mm

Commodore