Alkaline Water Ionizer and Water Machine by AlkaExpress Water Ionizers Model KEI 701-7 Plate High Performance Best Value Lifetime Warranty Comes with Free Extra Water Filter and Best Selling Book "The Miraculous Properties of Ionized Water" 7 Water Options: 4 ionized alkaline levels; 1 non-ionized purified; 2 ionized acidic presets levels Advanced 7-Plate Technology: 7 platinum coated titanium, long-life, durable, energy-efficient plates Self Contained Active Carbon Water Filter: Long-life, hi-tech filter purifies over 1,585 gal. Self-Cleaning: Unit cleans itself by reversing polarity after each use and auto-plate washing itself every 10.5 gal. Additional Features: Fully variable 4.5 to 11 pH; OPR Range +600 to -850mV(depending on source water); intuitive back-lit LCD, Limited Lifetime Warranty