About this item ?【Small Plasma Ball】-- The 3 inch plasma ball is a smallest one. The palm of an adult can hold the ball directly, which is more lovely than other sizes. ?【Touch Sensitive】-- Place you finger on the plasma globe surface, colored bolts of glowing light follow your every move. Plasma filaments extend from the electrode to the glass, giving the appearance of multiple beams of colored light, very beautiful in the dark, which perfectly demonstrating beautiful scientific phenomenon. ?【Great Christmas Gifts】 -- The magic plasma light will spark kid's curiosity, bring children's scientific fantasies to real life. Plasma Ball is perfect gifts for your kids, boyfriend & girlfriend on birthday, Christmas and all festivals. It is also great decoration for your bedroom, living room, office, writing desk or anywhere. ?【Magic Plasma Lamp】-- The plasma globe lamp can produce negative ions, which can neutralize the positively charged smoke and dust floating in the air through negative charges, causing them to lose their activity and precipitate naturally, ultimately purifying the air. Negative ions can also neutralize static electricity, effectively reducing static electricity pollution in the air. ?【Batteries & USB Powered】-- This mini plasma ball with a voltage of DC 5V, which can be directly plugged into your computer or laptop with USB cable or operate with 4pcs AAA batteries. Tips: USB charging cable is included, but batteries are NOT included.