This particular set of facial steamers has three basic functional options: aromatherapy, herbal, and ozone. The ozone steamer uses internal violet light and a boiling process to produce steam. The ozone variety of steam is also capable of increasing cell oxygenation. However, the steam, when combined with the natural aroma and herbal treatment, effectively treats your skin's imperfections, leaving your complexion soft and glowing. For normal skin, the ozone steamer should be used for six to eight minutes. For oily skin, it should be applied for eight to 12 minutes. For dry skin, the steamer should be used for five to seven minutes. For sensitive skin, the steamer should not be used for more than three to five minutes.