DELLA Ionic Air Purifier Ozone Ionizer Cleaner Fresh Clean Living Home Office Room Control Negative Ion Generator, which separate from the oxygen control Ultra-low energy usage, durable solid wood casing will keep this purifier cleaning for years to come Variable speed fan setting, Clean up to 3,500 square feet Voltage: 120/60hz, Ozone Output: 360 mg/hr, Watt: 21 Eco-Friendly Design, Breaks down odor causing pollutants