Microzone 300P: 120V/60Hz 300 mg/Hour

The Microzone 300P is a corona discharge ozone generator with a built-in air compressor and timer. Designed to deliver ozone under low pressure. 

Applications include residential spas, ornamental water features, small aquariums, water vending machines and water store recirculation systems. Dimensions: 9.75" h x 5.25" w x 3.50" d, 2.25 lbs. 

Ozone Output: 0.3 grams/hour @ 6.5 SCFH on ambient air.120V/60Hz 300 mg/Hour

See the Manual Here