(Replaces former part number IM600). The Altec Lansing iM600USB sound system offers stereo sound from dual 2-inch neodymium drivers optimized for high-frequency extension (better highs, in other words). It offers more power and output than any other system in its class and, what s more, it features another Altec Lansing engineering innovation called the Stereo Field Expander: SFX for short. SFX makes the speakers sound further apart than they really are, giving the user a heightened stereo effect. The iM600USB also features a stereo FM radio and can double as a clock radio when plugged in to an electrical outlet (AC adapter included). It includes rechargeable Li-ion batteries and a wireless remote. And it syncs and charges all dockable iPod 4th Gen. models. Whether on the go or on your desk or tabletop, the iM600USB resets the expectations for features and performance in a sound solution for the iPod.