Portable Plasma Orb Lamp with a Tesla coil. Globe novelty-style plasma lamp,colorful streams of electricity dance across the surface of the globe. Just touch the glass ball to generate and control the plasma streams with your fingers. Fun decor for any home, office, school or desk,Ideal gift for using science lap, or party. Operated by USB or battery (USB cable is included) Globe Diameter:3in You’ll get an awesome table lamp or eye-catching display piece to have in your home. Your kids will also love watching as the electrical waves dance around the inside of this globe, and for even more added enjoyment, watch as the pulsating waves of color attract to your fingers each time you run them along the ball’s outer edges. Turn on this device and experience static electricity and let the fun begin as you spend hours just watching these colorful rays flicker and bounce around. A small Tesla coil produces a large potential difference between it and the glass of the surrounding globe, similar to a cloud and its potential difference with the ground. Package includes: 1x Mini Plasma Globe 1x USB Adapter Cable