Altec Lansing inMotion IM310 Portable Speakers for iPod and MP3 Players Plays and charges iPod mini; iPod nano 1G, 2G, 3G, 4G; iPod classic 3G, 4G, 5G, 5.5G, 6G; iPod touch 1G, 2G Up to 48 hours of continuous play on three AA batteries (or use AC adapter) Big, deep-bass speakers provide surprisingly deep sound Folds up for carrying and weighs just over 2 pounds Auxiliary input for external audio devices