Alone the RoomGroove makes a great iPod speaker, but combine it with other RoomGroove speakers and you get an affordable, high-performance wireless home audio system that dynamically brings iPods, MP3 players and any device with a line level (or headphone) audio output to life. The RoomGroove iPod speaker utilizes premium woofers, crossovers, and horn-loaded tweeters to deliver accurate, efficient, and compromise-free acoustics. It features a retractable dock that charges all dockable iPods and comes with Apple universal well inserts to accommodate multiple iPod sizes. Other digital devices easily connect via an auxiliary input. More importantly, without wires or complicated setup, you can create a wireless speaker system using two or more RoomGrooves. Each RoomGroove acts as a transmitter or receiver, meaning it can wirelessly send CD-quality music to other RoomGrooves or receive CD-quality music from transmitting RoomGrooves. The robust 2.4GHz wireless technology found in the RoomGroove offers unlimited add-on opportunities. Plus, the technology "sniffs out" the entire 2.4GHz band to detect other wireless technologies in use, such as wireless routers, and then transmits around the spectrum used by those sources. The home code dial on each of these wireless speakers allows you to select a code specific to all of your units to avoid interference from neighbor systems. And, a RoomGroove gives you a choice. If a home has three RoomGrooves and "Song A" is playing in the bedroom and "Song B" is playing in the office, then the RoomGroove in the kitchen can listen to either song or play what's on its own iPod.