1. Reverse Osmosis technology 2. No need pressurized tank, it solves the secondary pollution caused by water tank itself 3. The ratio of waste water to pure water is 2: 1, save water and energy much 4. Colorful indicators show the working states 5. With cartridge auto-alarm system (optional) 6. The life span of the RO membrane is more than twice of that f traditional 50 GPD water purifiers 7. Pretreatment system adopts three stage standard 10 inches filters, it is convenient to be installed and altered 8. Compact appearance 9. Optional pump