The iMan Speaker System from iSound is a great way to enhance your audio experience when listening to music through your phone or other portable devices with a 2.5mm or 3.5mm audio jack output. The speaker system features a display dock in the front which is ideal to hold your iPhone, iPod and various smartphones. The iMan Speaker System may be powered via USB cable (included) or by using (4) AAA batteries (not included). The speaker system is foldable, highly portable and comes in a protective carrying case which also features a battery compartment. Additionally included are a 2.5mm audio adapter, a 3.5mm audio extension and a USB power cable.