JammyPack is a portable speaker bag that easily connects to any iPod, mobile phone, mp3/cd player, hand held gameor multi-media device. JammyPacks pump LOUD. We use only the highest-quality, water-resistant, silver stamped magnetic, open source, mini-speakers; boosting 3W of stereo-amplified beats per speaker. Engaging in the highest qualified range; volume with quality. It's all in our uniquely designed, single-volume, woodbox construction. Allowing for the perfect balance of volume depth X speaker diameter ratio. Coupled with our 8W internal driver that has been balance engineered to distribute a variable range of power to each speaker, preventing blowouts and distortion.