Foldable Cube Speaker for all iPods w/ White AC Charger [Electronics] Output power: 0.9w + 0.9w Frequency Response: 150hz - 18hz Speakers: 50mm, 4ohms Plugs: 3.5mm stereo gold plated plug Power Options: USB power cord (included). 4AAA batteries (not included), Universal DC 6V adapter (not included)