What is in the filtersActive Carbon, Ion Exchange Resin, Negative Potential ParticlesFeature and Advantage1) Convert the regular tap water into alkaline and ionized water. 2) With a digital indicator which can remind you to replace the cartridge in time based on the drinking people number.Main Function1) Creates a silky-smooth and sweet tasting water.2) Helps filter out chlorine and other contaminants and permanently absorbs metals such as lead and copper, so your drinking water will be more refreshing and clear.3) pH 8.5-10.0 which help to support systemic pH balance in the body, you body will function optimally.4) Provides low negative ORP: -100mv to -200mv, transforming regular water into antioxidant water, which reduce the oxidation of your body, you will be more youthy.5) Reduces water molecule size, which create a very absorbable water.6) Contains alkalinize minerals to make water more energy, you will feel vigorous drinking this energy water.Item Capacity2 Liters of filtered water(total capacity 3.5 liters). MaterialBody: foodgrade AS.