Ozone sterilization, no residual toxic substances. It is used for disinfection, sterilization and elimination of various odors in clean rooms of public places, hospitals, factories and mines. Oxygen sterilization and deodorization, high vitality, wide and fast, no dead bacteria. The ozone board is easy to carry and easy to use for professional DIY. Using high pressure, ozone is generated from dry air or oxygen in the air. specification: Power supply: AC Function: In addition to formaldehyde Air volume: 301-400m3/h Style: Air Purifier Type: ozone generator Noise: less than or equal to 40dB Benzene removal rate: 99% Formaldehyde removal rate: 99.90% Application area: 41-60 Installation: USB Wind speed: standard Usage conditions: household colour: blue Material: ceramic + aluminum Package Contents: 1 * 7g/h ozone generator accessories Only the above package content, other products are not included. Note: Light shooting 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.