The iSound Quad-X Portable Speaker System features 4 drivers to provide you with high quality sound in a compact, foldable design. The Quad-X features a device holder that fits all iPod models and similarly shaped audio devices. Additionally the speakers can be used with any device that features a 3.5mm audio port such as smartphones, tablets and MP3 players. The Quad-X Speaker System is foldable and therefore travels and stores easily. Power your system with either the included USB cable or (4) AA batteries (not included). The box includes the Quad-X Speaker system, a built-in 3.5mm audio cable and a USB charge cable.