AQUAVI Countertop Alkaline Spring has not only slim & compact design, high performance cartridge, sanitary & easy filter replacement. Increases water pH to 8-9.5, providing alkaline water. It uses Active Minerals technology to reintroduce essential minerals like calcium, potassium, and magnesium, resulting in a natural and refreshing taste. Removing 99.99% of the 1,000+ contaminants including viruses, bacteria, chemicals (PFAS/PFOA/PFOS, Pharmaceuticals), heavy metals (Lead), chlorine, TDS (fluoride, nitrates/nitrites) and etc. Auto shut-off system and Nano technology as water purifier, but also convenient changeable tray by magnetic. It has also NO ANNOYING NOISE and NO ELECTRICITY. When the machine is open, it shuts off the feed water and release the internal pressure, which will help you replace filters.