Green-Tak Compact Hydrogen-rich Water Purifier has unique ability to produce hydrogen-antioxidant of magnesium media dissolving into the water. Daily drinking hydrogen-rich alkaline drinking water brings beneficial effects for human bodies. Features International Quality Standard. High concentration of hydrogen water. No power consumption, energy saving. Filter material and medias meet Food Grade / NSF standard. Premium carbon media to absorb Volatile Organic Compounds (VOCs), pesticides and chlorine effectively. Quick change filter type, easy filter replacement. Remove bacteria. Remove heavy metals such as lead, mercury, etc. Remove bad smell and odor.