Run only in UNOCCUPIED AREAS! The PRO-44 ozone generator is designed with the professional and home owner in mind, covering up to 6000 sqft for odors and 1000 sqft for mold! It has a built in timer that shuts off the unit automatically after the selected time (up to 12 hours or continuous run). You can also select the amount of ozone to make from 200 to 4000 mgph (or 1000 to 20,000 mgph when used with pure oxygen). It uses corona discharge ozone plates with stainless steel grids, to produce the maximum ozone output. Electrical: 120 V AC, 40 watts Timer settings: Hold ( for continuous operation) or timed from 15 min. to 12 hours Dimensions: 8 in. x 10 in. x 5.5 in. high Weight: 9 lbs. Ozone generators are no longer allowed to be shipped to California residences, pursuant to AB 2276 (Air Cleaner Regulation) . If you would like to purchase one of our ozone generators in California for an industrial application like mold and mildew remediation or odor removal in unoccupied spaces, contact us for one of our industrial supply outlets near you.