Removes 98%+ of all contaminants in your tap water 3-Stage RO unit, 1 RO membrane, Green Coconut Carbon Filter, cleanable sediment filter, membrane power flush kit, automatic shut-off valve, pressure gauge The Stealth-RO150 includes your choice of both 1:1 and 2:1 waste to product water ratios The Stealth-RO150 produces 150 GPD of ultra-pure water The Stealth-RO150 models now produce 50% more filtrate water than previous models