ALF was a US sitcom by NBC that aired from September 22, 1986 to March 24, 1990.
Coleco made a "Storytelling ALF" plush toy doll with a built-in cassette player with a by Alf recorded tape included. It can also play any standard (music) cassettes.
The dolls' mouth moves in sync while the cassette plays, ears and eyebrows move at irregular intervals.
What's it worth? Take a look at this Talking Alf price guide: sold listings for a value indication.