... fresh air thereafter.Construction:This machine is made up of generator, quartz tube, stainless steel cover and 60L air compressure. Features ... .The unique design prevents the cycled-water from damaging the generator.The generator is durable, with a long working life.There are ... 30-80 80-120M 2 180 Source Oxygen source (Oxygen generator / bottled oxygen) or clean dry air Ozone Concentration Oxygen ...