Battery or USB Powered Switch Controlled Inert Gas Plasma Ball with 6" Glass Globe and ABS Plastic Base Plasma Ball can be Set onto Sound Responsive Mode where Streamers Activate when a Sound is Made Can be Powered with Either USB Cable (Included, Adaptor Required) or 4 AA Batteries (Not Included) Great Gift for People Interested in Science, into All Things Retro, as a Night Light or for Mood Lighting Measures Around 23 cm by 14.5 cm by 14.5 cm for Indoor Use Only | Operated via Battery or Micro USB Cable