Altec Lansing inMotion iM500 Speaker System for iPod nano 1G, 2G (Black) Lightweight speaker system with built-in speaker dock for iPod nano 1G, 2G Syncs iPod with PC via mini USB 2.0 connection; also charges iPod Folds into compact footprint for transporting in backpack or briefcase Powered by AC adapter (included) or 6 AAA batteries (not included) Measures 8.5 x 5 x 0.7 inches (W x H x D)