Ignitek iCheer Portable Audio System for iPod nano 1G Compact, portable speaker system designed for the iPod nano 1G Pair of 15-inch drivers deliver 300 Hz to 20 kHz response Built-in cradle docks and charges iPod nano while you listen Runs on 4 AAA batteries or AC power; extra-long battery life Measures 669 x 464 x 067 inches (W x H x D); 1-year warranty