Altec Lansing inMotion Portable Audio System for iPod (White) Mobile, portable speaker system for dock-connecting iPods, including iPod mini, iPod nano 1G, 2G, 3G; iPod 3G, 4G, 5G, 5.5G, 6G; iPod touch 1 G Dual 1-inch neodymium micro drivers per speaker deliver big sound in a small format MaxxBass technology creates a sense of rich, deep bass without the need for a subwoofer Lightweight and compact; includes AC power adapter and charges your iPod while docked Efficient, class-D amplifier offers up to 24 hours of continuous playback with 4 AA batteries (not included)