iSound iMan Portable Speaker System Connects to your iPhone, iPod, smartphone and other portable devices with a 2.5mm or 3.5mm audio jack output 2x2W full range dual micro drivers System can be powered via USB cable (included) or by using (4) AAA batteries (not included) Includes protective carrying case with battery compartment Also includes a 2.5mm audio adapter, a 3.5mm audio extension and a USB power cable Includes: Protective Carrying Case; USB Cable; and 3.5 mm audio extension Works with any audio device using a 3.5mm or 2.5mm audio output (With included adapter) Dual micro drivers powered by USB cable or 4 AAA batteries (batteries sold separately)