SESAME STREET WHEN IS SATURDAY Cassette Tape & USB Flash Drive with MP3 Files Cassette Tape transferred the audio book to USB Flash Drive with MP3 Files (cassette tapes are not digital, the sound quality is not equal to digital) you do not need the cassette to listen to the audio book, just plug in the USB Flash Drive into your computer. weight 3.3oz LOVE TO BUNDLE with other items SMOKE FREE Pet Free Environment