An innovative stereo sound delivery system for that special moment between mother and her baby in-utero... Bellysonic is made of 100% organic sherpa cotton. The pouch comes with mini-digital stereo speakers that are spaced to deliver stereo sound optimally to the womb, with room for a small mP3 player. A splitter for sharing the music listening experience with either parent-to-be is included.MP3 or CD player, not included.