Check the listing for details. USB magic electrostatic ion ball lamp lightning ball Nightlight atmosphere lamp. Color: Black, Condition: New. Listed at 14.58 USD. Product Name: Magic ion ballProduct material: glass, PVC, electronic componentsProduct size: about 14 * 10cmBall diameter: 7.5cmProduct weight: about 226g (including package)Power supply mode: 5V USB cable or 4 batteries (self provided)Product function: purify air, disinfect function1. Prevent hard objects from hitting the sphere and try to avoid being wrongly used in wet places. When placing the sphere, the surface of the sphere should be kept at a distance of more than 0.5 m from other electronic equipment and large conductors (such as metal cabinet, metal frame, goldfish tank, etc.) to eliminate possible interference and influence on lamp work. When there is dust on the surface, gently wipe it with a soft wet cloth after turning off the power supply, Wait until the surface of the sphere is dry2. In order to use the product for a longer time and prevent the ball from overheating, it is recommended that the continuous power on time should not exceed 2 hours each time.3. Please do not stop when touching the surface of the glass sphere. If it is not moved for a long time, it will overheat the sphere. It is recommended to stay at a certain place for no more than 10 seconds.Quantity: 1set