Features: 1. USB power supply or battery power supply. Very convenient to use. 2. With function of purifying air. The negative ions emitted by the sphere have the function of freshing air. Negative ions can neutralize the positively charged smoke dust floating in the air by negative charge, so that it loses its activity and naturally precipitates, eventually achieving the purpose of purifying the air. 3. When the ion sphere is working, a field similar to the point charge is formed around the electrode in the center of the ball. When the ball is touched by hand (the person is connected to the earth), the electric field and potential distribution around the ball are no longer uniform and symmetrical, so the glow becomes brighter around the finger, and the generated arc moves along the touch of the hand. Twist, dance with your fingers, table decorating crystal lamp. 4. Adopt a USB flashlight to illuminate your desk or cast a sparkling night glow. 5. Just plug in the USB port of your PC or laptop and let the flashing lights flash. 6. Enhance color and emotions atmosphere through a series of sparkles. Specifications: Model: 3in USB magic electrostatic ball ion ball (USB + battery) Light source power: 0.5w Material: ABS base + glass sphere Color: Black Power supply mode: 5V USB power supply or 4 * AAA battery power supply (without battery) Size: Approx. 14*10*10cm/5.51*3.94*3.94in Package List: 1 * Ball 1 * User Manual 1 * USB Cable 1、USB power supply or battery power supply. Very convenient to use. 2、With function of purifying air. The negative ions emitted by the sphere have the function of freshing air. Negative ions can neutralize the positively charged smoke dust floating in the air by negative charge, so that it loses its activity and naturally 3、When the ion sphere is working, a field similar to the point charge is formed around the electrode in the center of the ball. When the ball is touched by hand (the person is connected to the earth), the electric field and potential distribution around th 4、Adopt a USB flashlight to illuminate your desk or cast a sparkling night glow. 5、Just plug in the USB port of your PC or laptop and let the flashing lights flash.