This is an advanced water filtration system as recommended by John Thomas in his ground-breaking book 'Young Again'- an excellent investment for the health of yourself and your family. The above link URL is the actual manufacturer of these units, this one being a BEV 100 Series Countertop Pure Water appliance.
This dual-filter unit filters your water through 7 stages of water purification including reverse osmosis; you end up with delicious, bio-compatible BEV-certified water. The BEV standard was established in the mid-1900's by French Professor L. C. Vincent and is considered by many to be the highest benchmark for water purity and bio-compatibility.
The unit is very quick to install and ridiculously easy to operate; it requires no electricity- only of course adequate water pressure. The quick-connect coupler attaches to your faucet and from here, removes a host of contaminants including chlorine and organic contaminates, sand or rust deposits, salts, heavy metals, waterborne micro-organisms, pesticides, drug residues, and more. purewatersystems.com is professionally run and stand behind their work for the entirety of the product's life. The unit is Made in the USA by the way (how rare is THAT nowadays)!
FAR superior in quality to Brita or PUR water pitcher filters, this unit's filters last a year or more (depending on frequency of use and quality of your existing tap water) whereas Brita or PUR's require replacement every 2 months or so. This is an *EXCELLENT*, state-of-the-art system. You will be amazed at the taste of your former tap water- it's like owning your own personal mountain spring!
This is a used unit and best offer is considered although I am looking to get @ $200 for it; new, it retails for $699 as you can see in the above link. Its filters should be good for at least another 4-6 months. Contact me with any questions. Thanks.