This ozone generator continuously generates ozone by corona discharge and can produce 1 gram of ozone per hour from oxygen. It has no built-in air pump so that it can be fed with different air sources, such as pure oxygen from an oxygen tank or an oxygen concentration and ambient air (use with an external air pump). This ozone generator is ideal for high ozone output applications that most other home ozone generators cannot provide, as well as ozone applications that require a different air source than ambient air. Ideal in treating drinking water from a water tank, many other industrial applications. Features: Low noise (less than 30DB). High output corona discharge ozone tube with low power consumption (25W). High speed ball bearing cooling fan (48 CFM). Precise ozone output calibration. Can be fed with different air sources. Compact and rugged construction. Specifications: Max.Ozone Output: 1000mg/h, adjustable Pump Output: Not included, external gas supply equipment is needed Power Source: DC24V (AC (100V-240V 50-60Hz 40W) to DC adaptor is included) Ozone Generating Method: Corona Discharge (Ozone Tube) Wattage:25W Dimension: 24 x 15 x 12cm (9.4 x 5.9 x 4.8 inch) Net Weight: 1.76kg (3.88 lbs) Case: High strength painted metal. Materials on Ozone Path: Glass, Stainless Steel, Silicone, High-density polyethylene. Set includes: 1 x Ozone Generator 1 x Power Adaptor English Instruction Manual