http://www.stumbleupon.com/su/2VU0Xq/:C8tLr9VQ:mVOk4Z.z http://www.stumbleupon.com/su/2VU0Xq/:C8tLr9VQ:mVOk4Z.z http://www.stumbleupon.com/su/2VU0Xq/:C8tLr9VQ:mVOk4Z.z

Just glanced at this, and realised there was a lot to this item. Interesting technology that was invented by none other than Louis Theremin.