Portable spa / hot tub ozone replacement. Fits almost all hot tubs on the market today up to 750 gallons. Uses the amp plug connector.The Spa Eclipse Next Generation Corona Discharge system matches the capabilities of our own High Output units at a fraction of the size. Featuring DEL’s exclusive Advanced Plasma Gap technology, the newly engineered design is now equipped with Auto Voltage Sensing. It’s the reliability, performance and technological advancement you can only expect from DEL Ozone.