The key words that David Granath takes to describe these sound clusters are flexible and mobile. Use single pieces or use a bunch of them together, the choice is entirely yours. Collectively they are ideal to create stereo or surround sound. The good news is that you can plug them into the wall socket for power or hook them to some cumbersome cables and then to a power source. Sound is transmitted via Bluetooth, Wlan and works with iPod and many other players. - Ian from Bookmarklet