Description: Plasma ball for more fun and interaction. This plasma ball is a great decoration for your bedroom, living room, office, or anywhere! It will create a super cool scientific atmosphere. It's part science, part magic, and all fun! Just slide the switch to the ON position, this plasma sphere reacts to your touch, sending beams of light wherever your fingertips go, very beautiful in the dark, nicely demonstrating beautiful scientific phenomena. If your child is the curious type who is always impressed by all things scientific, they will be absolutely delighted by the electric ball. Help them discover the secrets of plasma in a way that is larger than life and completely safe. The magical plasma light will arouse children's curiosity, realize children's scientific fantasies. When the ion ball works, a field similar to a point charge is formed around the electrode in the center of the ball. When the ball is touched by the hand, the distribution of the electric field and potential around the ball is no longer uniform and symmetrical, so the glow becomes brighter around the fingers, and the common arc swims and twists together with the hand, and dances with the movement of the finger. Specifications: Material: ABS + glass Size: 8*14cm Black color Power supply: USB cable plugin/4 AAA batteries (not included) Product list: 1st plasma ball lamp 1st USB cable Notes: Please allow a slight dimension difference due to different manual measurements. Please note that a slight color difference should be acceptable due to the light and screen.