Features: - Air-cooled - LED Status indicators for power and ozone outlet - Amp meter - Variable Ozone Output (10%-100%) - LED Ozone Default warning - Durable frame and enclosure - Teflon for O3 outlet - Stainless steel fittings Applications: The item is designed for different application, such as drinking water, water tank, fish farm, swimming pool, cooling tower, large spa and hot tub, mineral water purification,etc. Specifications Place of Origin: Guangdong, China (Mainland) Brand Name: BWT Model Number: SP-3 Voltage: 220 or 110 VAC, 50/60 Hz Cooling way: Air cooling Warranty: 1 Year Ozone output: 3 g/h Application: Pool, Spa, Hot tube etc. Ozone produced method: Corona discharge Size (cm): 11*8*14.3 Gas feed: Oxygen or clean dry air Concentration g/m3: Oxygen(25-45) Air(5-15)