How to use?Turn on plasma mode every 8-12 hours, and keep your nose breathing normally for about 10 seconds at the air outlet. The product is for research testing purposes only. O3 ozone mode is an additional feature. It can be used for household sterilization. Unlike the mechanism by which low-temperature plasma acts on the human body, the ozone function can be used for tests and comparison. Specifications: Supply voltage: 110-220V (10%) Power: 5W-40W (adjustable) Material: Metal+Plastic colour: black+grey Package Contents: 1 x Plasma Generator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.