Designed for Mr. Coffee easy measure 12-cup programmable coffee maker and for Mr. Coffee dishwasher-safe 12-cup coffee maker (sold separately). 2-step filtration process - Activated carbon reduces up to 97% of chlorine for better tasting water - Ion exchange resin reduces calcium to help prevent mineral buildup How to use - Install the cartridge in the holder by opening and then closing the hatch - Place the holder in the designated slot at the back of the water reservoir - Remove the holder and cartridge when cleaning your coffee maker When to replace - Replace cartridges once a month (or every 30 tank refills) - Set the dial on the water filter holder to the current month as a reminder Practical use scenarios - Daily home brewing: enjoy cleaner water and a better-tasting cup - In areas with hard water or noticeable chlorine: reduces mineral buildup and chlorine taste - Regular maintenance: supports consistent performance of your Mr. Coffee machine and helps minimize descaling frequency