... 3. Adjustable ozone output, Use high-frequency & Intelligent power supply inverse system, ozone output can be changed on demand ... Gas flow meter ,Voltage meter ,Current meter ,Work instruction ,Power indication ,On/Off ,Ozone output adjuster ,Pressure regulator ,Trouble ... *840 Protein SkimmerFeaturesInstead the using of Venturi, Booster pump, low power for saving energy.Using the collecting pipe, no ...