Waterdrop TSU 0.01μm Ultra-Filtration Under Sink Water Filter System, 3-Stage Tankless Undersink Water Filtration with Faucet, Smart Panel, No Waste Water, No Electricity Required, Does not Lower TDSSave Water & Keep Minerals: This under sink water filter system reduces 30+ substances, and retains essential minerals in the water. No wasted water, no need for power source, and no pressure drop. Note: This under sink water filtration system will NOT REDUCE TDS. Taste the Difference in Our Water: 0. 01 micron Waterdrop Ultrafiltration Membrane, this under sink water filtration system filters chlorine, PFAS, taste, odor and heavy metals, offering