This plasma ball uses the principle of plasma discharge. When you put your hand on the ball, the electron beam will appear where you touch, Your hand seems like with magic. Electron beam will dance with your hand, it is full of vitality. Except for lighting, it will produce lots of anion. It can sterilize and purify the room. Under the function of heat effect, it will diffuse in the air, this magic light can produce anion, which can clear the air and absorb the harmful gas, particle and dust. When the anion combines with bacterium in the air, the construction of bacterium will be changed, and finally bacterium will be destroyed. Please note this plasma is usb and battery powered, the battery is not included, no music.