The inMotion iM600 is a good-looking speaker, matching the iPod Touch with its thin and flat design. It is a portable design, with the stand folding up to make a compact travel companion. Additionally, the iM600 contains a rechargeable lithium-ion battery, which can provide up to 7 hours of play. No AA or AAA’s to worry about carrying around with you!

This inMotion speaker has a number of other useful features. It includes a small remote, which can control both the speaker set and your iPod. The iPod plugs into its dock, which will charge your device, and can also be operated via the sleep and alarm clock features on your iPod. Finally, the inMotion includes an FM tuner and auxiliary input jack – great for when you need to listen to something other than your MP3′s.

Altec Lansing’s iM600 also includes a unique feature to bolster the sound quality. It includes ESS (Expanded Sound Stage) technology, to help make the speakers seem farther apart than they really are, helping reduce one of the downsides of small speaker packages.

The inMotion iM600 is a great device for anyone looking at a portable iPod speaker system, particularly if you are interested in an internal, rechargeable battery.