If you want great sound from your iPod Shuffle, the N21 is for you. It is also compatible with MP3 players, cd players and laptops, with a synchronizing port to connect to your computer. For your convenience it features easy-to-use volume touch controls. For your listening pleasure, it provides a clean sound enhanced by high output levels. Plus, while it's playing your iPod Shuffle, it's also charging it, making the N21 an indispensable part of your music experience.