Crystallove USB or Battery Operated LED Plasma Ball Decorative Ligh Material: ABS plastic lampholder, Glass lampshade Size: Dia.of plasma ball, 3.5inch; Height: 5.5inch Power supply mode: USB or Battery; Voltage: 5V This is a very magic lamp ball, plug in the power, turn on the lamp, then the ball will burn out many long pink light around it. You can control the light by your fingers or hands, gather, scatter...But please pay attention, don't keep near it to smell it for too long time, because it may make your throat feel not no well Simply plug into your PC or laptop's USB port and let the glitter lights sparkle away, bottom is also transparent so kids can see the battery-free mechanics of the ball