All newly designed models feature state-of-the-art circuitry design using the latest in digital technology. Clearly the most accurate and reliable mineral ionization system in the world. Unit will dynamically adjust output voltage to match electrode conditions extending the life of the control unit and savings as much as 60% in electricity usage. Total digital design and output. Features a digital display of the milliamp output, alternating electrode indicators, check electrode warning and much more. Durable weatherproof enclosure. Clear window for easy monitoring and secure latch. Unit includes control box (which will work on 110/220 VAC automatically), 6 electrodes (one set per 75,000 gallons of water being treated), unique clear flow cell chamber, electrode wire, mounting brackets and test kit All models are NSF Standard 50 approved, UL and CUL listed. NASA licensed technology.