Frizzlife MK99 Top Notch Under Sink Water Filtration System has a unique technology that removes over 99% of contaminants while leaving in all essential minerals which are vital to your health. So you and your family will enjoy pure, spring-fresh water from the tap. Features: Fast Installation---The quick twist-in installation design makes it take less than 3 minutes for you to install the system or doing a filter cartridge replacement. Auto Shut Off Design--The filter cap is designed with an auto shut off switch. you don't even need to shut off the water supply whenever you work on the filter cartridge replacement, which brings a lot of conveniences. Protect Your Earth and Money Saving --The system contains a core filter cartridge inside the housing, you will only need to replace the core part of the filter cartridge instead of throwing away the whole plastic part, it will save you much money on replacing the cartridges and will do a lot of help on protecting our mother earth. Compatible With Your Cold Water Line---No matter your sink has a 3/8" or 1/2" feed water valve. It can compatible with both and directly connect to cold water line and your existing faucet. 2-Stage Advanced Water Filtration can remove over 99.99% of LEAD, CHLORINE More cost effective to replace the filter Sediment filter cartridge with 5 micron precision reduces particles such as sand, silt, and rust from the water. Block carbon filter cartridge with 0.5 micron precision that reduces 99.99% of Lead, Chlorine, Odor and Particles from the water. Removes over 99.99% of contaminants while leaving all essential minerals behind. ✔Removes over 58 contaminants commonly found in drinking water, including 99.99% LEAD, heavy metal, sediment, chlorine taste & odor, chemicals, etc... ✔Essential minerals were leaving behind such as Calcium, potassium, sodium, magnesium, phosphorus, chloride, etc... ✔However, these essential minerals are dissolved solids, PPM will not be dropping if you test with a TDS mete