Boost your music with the TravelSound ZEN Stone portable speaker. This palm-sized one-piece high performance speaker lets you share music stored in your ZEN Stone or ZEN Stone Plus MP3 players instantly. Hear your music in greater clarity with the high-quality microdrivers ingeniously built into its aesthetic design. For mobile party goers, the TravelSound ZEN Stone boasts amazing playback stamina of up to 21 hrs on 2 AAA batteries! With the retractable stand, just prop it up on any flat surface and tune into beautiful music anytime, anywhere.