Your grandmother regularly listens to oldies music on a collection of cassette tapes using a Sony Walkman (vintage 1989). She appreciates the ability to take her music with her when she goes on walks. You are convinced that a newer music player, such as an iPod touch, would bring her into the current era, even though cassettes are making a comeback among the hip crowd. What features of the music player would you point out to her to help ease her concerns of "perceived usefulness" and "perceived ease of use"?