Crystal Quest CQE-CT-00142 Countertop Reverse Osmosis Water Filter System Portable 3-stage Reverse Osmosis System provides safe, pure high quality drinking water with capacity of up to 50-Gallon per day It is great for homes, apartments, office, recreational vehicles, motels, and laboratory use Reduces silt, sediment, cyst (Giardia, Cryptosporidium), sand, rust, dirt, and other un-dissolved matter Heavy metals such as lead, mercury, copper, nickel, chromium, cadmium, aluminum, and other dissolved metals are removed from the water by the electrochemical process They are attracted to the surface of the media, much like a magnet