Sterilization, deodorization, virus removal by chemical reaction with chlorine dioxide.Recommended usage period: Approximately 2 yearsDo not spray on colored fibers (clothes, rugs, cloth wallpaper, etc.), leather goods, blankets, etc. It may be bleached.Also, do not use it for precision equipment.High concentrations can corrode metals.If you feel uncomfortable due to the odor of the ingredients, ventilate.Please use and store away from high temperature and direct sunlight.