This cassette to MP3 converter produced the best sounding conversions and was easy to use, thereby earning The Best designation from the Hammacher Schlemmer Institute. Unlike lesser devices that produced distorted, fuzzy recordings, The Best model converted cassettes into MP3s with the clearest, superior-sounding audio that replicated the original. Once The Best model is connected to a computer via the included USB cable, music is automatically converted to MP3s via the included computer software that allows you to title songs, adjust the sound, and create mixes at the touch of a button. About the size of a classic Walkman, the converter is easy to transport, it plays cassettes through an integrated speaker or the headphone port, and it converts cassettes into .wav, .ogg, or MP3 formats that can be transferred to a CD, iPod, smartphone, or a portable digital music player. Requires two AA batteries. 5" L x 3 1/3" H x 2" D. (12 oz.)