This is the professional-grade, ultra-fast ozone deodorizer, the Rapid Deodorizer PF-22. Type: Professional Deodorizer Function: Emits ozone and negative ions for deodorization and disinfection. Features: Adjustable ozone concentration and operating time. Small, lightweight, and easy to carry. Uses: Effective for odor control in areas such as tobacco, pets, toilets, hotels, restaurants, hospitals, nursing homes, and kitchens. Can also be used in vehicles, provided there is a power source. Features: Small and lightweight, making it easy to carry, and allowing you to select ozone concentration and operating time depending on the location. * 10-tatami room (approx. 16 square meters): Ozone concentration 2.0ppm / Timer setting 20 minutes * Toilet: Ozone concentration 2.0ppm / Timer setting 10 minutes * Passenger car: Ozone concentration 1.0ppm / Timer setting 10 minutes * Smoking area: Ozone concentration 0.1ppm / Timer setting Continuous If you set the ozone level to exceed 0.1ppm, please post the included warning sign at the entrance to prevent people and animals from entering. Also, although ozone converts to oxygen over time and becomes harmless, it will remain for about 30 minutes, so please refrain from entering during this time. This is not a toy-like, placebo deodorizer, so please research the handling instructions thoroughly before use.