Here is another cool Bluetooth speaker for geeks in your life. The SoundCandy Plasma Bluetooth Speaker not only plays your favorite music but has Plasma lights that move and dance to the rhythm of your music. The device is powered via USB, so you don’t need to use an adapter for it.
While this is not the most powerful speaker around, it does put on a plasma light show as you listen to your music. You can find out more about it here.