Unquestionably, the finest mineral ionization system in the world. all newly designed state-of-the-art microprocessor designed model features a large LCD display for easy monitoring. features 120 precise settings. unique flow-cell assembly allows for visual inspection of the electrodes and easy change-out without any tools. as an added bonus, the unit includes a built in\xa0scaleblaster® that will remove and prevent limes scale buildup in pipes, pool equipment and pool walls. durable weatherproof enclosure includes pvc fittings, a unique flow cell chamber, test kit and signal cable. unit automatically adjust to 110/220 VAC upon installation. handles up to 50000 gal. NSF standard 50 approved, UL, CUL listed