This amazing light show reacts to your touch and now also your sound making it great for placing on loudspeakers. Argon and Neon lightning bolts, also known as Plasma filaments, are projected from the centre electrode to the outer diameter of the ball. The electric conductivity of your hands or a finger on the outer ball will attract lightning bolts and create a spectacular effect. Use with batteries or the USB power cable included. Includes plasma ball, USB power cord, full instructions for fast set up and use. Now with sound reaction. Pulsates and illuminates to the beat of the music; . Size H14, W9.7, D9.7cm. Suitable for indoor and outdoor use. Suitable for age 6 years and over. No wiring required. Batteries required: 4 x AAA (not included).