This Waterdrop T3-M Remineralization Reverse Osmosis Water Filter is NSF/ANSI 372 Certified and features an advanced 9-stage filtration system with a 0.0001μm RO membrane, effectively reducing heavy metals, chlorine, PFOA & PFOS, as tested by a third-party laboratory. This tankless under-sink RO system provides a fast, steady 450 GPD water flow and is infused with essential minerals like calcium and magnesium for better taste and health. It boasts an eco-efficient 2:1 pure-to-drain ratio, an LED light, continuous automatic flushing, and smart alerts for filter replacement, with an all-in-one cartridge for effortless replacement. Requiring a plug-in connection, it offers a compact design for under-sink installation.