Touch sensitive plasma ball - A field forms around the central electrode inside the globe. When you touch the ball (your hand is connected to earth), the electric field and potential distribution become non-uniform, making the glow around your finger brighter. The arc will move and dance in response to your touch and movement. Air purification function - The ball emits negative ions that help freshen the air. These ions attach to positively charged smoke and dust particles, reducing their activity and encouraging them to settle out of the air, contributing to air purification. USB rechargeable - The plasma ball lamp supports USB power with a built-in rechargeable battery, providing convenient power options for cord-free use. Decorative effect - This 3 inch plasma ball lamp adds a striking science-inspired accent to any space. It works well as a desktop decoration in bedrooms, living rooms, or offices, creating a cool, modern atmosphere. Key benefits and why you may want it - Interactive lighting: engaging, touch-responsive display that responds to your movements. - Subtle air improvement: negative ions help reduce airborne particles for a cleaner-feeling environment. - Flexible power: USB rechargeable for easy charging from computers, chargers, or power banks. - Compact and stylish: a 3 inch globe that serves as a focal point without dominating the room. Use scenarios - Home workspace or study desk: use as a dynamic ambient light that reacts to your touch, keeping the desk visually interesting. - Bedroom nightstand: a soft, interactive light source that adds ambiance while doubling as a conversation piece. - Office reception or break area: modern decor that sparks curiosity and enhances the space with a science-inspired look. How to use - Place the lamp on a flat surface. - Connect to a USB power source to charge or operate. - Light responds to touch; glide your hand over the globe to influence the glow and arc movement. Specifications - Size: 3 inch diameter plasma ball - Function: interactive touch-responsive plasma glow; negative ion air purification - Power: USB rechargeable with built-in battery - Applications: suitable for bedroom, living room, office, or other indoor spaces