Blue neon moves up and down its antenna like tubes to the music beat or sound intensity. Or, you can set the neon to constant on to fill the tubes. The antenna positions are independantly adjustable. The dial on the front allows you to control the sound sensitivity. Supplied with a 12V adapter, it can be plugged in. Or, using our Battery Pack, BPP-3201-3, you can use the Blues Blaster where power is not accessible, such as for table centerpieces.