The company is selling two tape decks. Both have the same basic specs for cheap hardware: there’s a single mono speaker, an AM/FM radio, an integrated mic, and a single-direction deck (so you’ll have to flip the tape yourself, just like the good old days). Odds are that you won’t get the best-sounding speaker, but that’s not really the point.
The $60 CT100 model can also get shortwave radio, and it adds some rather anachronistic support for playing music off SD cards and USB drives. The $70 CT200 skips those features but adds treble and bass dials and a VU meter, which looks cooler and thus commands a higher price.
Again, neither of these players are likely going to give you an audiophile-level experience. But if you’re looking for somewhere to play your retro Guardians of the Galaxy soundtrack cassette, they should work just fine.