16" plasma disk

I paid $5 for this thing. It was $10, but since it didnt have the power adapter I talked him down $5. After doing some googling it looks like it sold for $90 new so I guess I got a good deal.

The disk actually looks way bigger in person, I put my astrobaby next to it for size comparison. It has a sound activated mode, as well as a regular on mode. There are 2 knobs on the back that change the sound sensitivity as well as how fast the plasma moves.