EC Series Model EC450 Alkaline pH Water Ionizer Adjustable pH monitor, Built-in ORP meter, pH selection of 3 levels Alkaline pH Range to 9.0 - 9.9+ .. 3 Platimum Electrodes.. 456 cm2 ORP --100 to -600 mV (Alkaline Water), 600 mV to 850+ mV (Acid water) Switched-mode power supply (SMPS), AC110V, 150 Watts, CE certification Manufacturers 5 Year Warranty ... Central USA Service Location