The Waterdrop C2SL countertop RO system features 7-stage filtration, a 0.0001 μm membrane and mineral enrichment for a balanced taste. Its installation-free design automatically fills a detachable 40 oz glass pitcher from the 108 oz feed tank. Smart alerts simplify operation, while the filter lasts up to 528 gallons or 12 months and provides a 3:1 pure-to-drain ratio. | Waterdrop | | C2SL Countertop Reverse Osmosis Water Filter, | Mineral Added | EXTRA C2RFL Filter | White | Best Buy