The Mi Water Purifier 1A removes 99% of contaminants in tap water. To minimize its footprint and size, it innovatively integrates a complex piping system into one unit. The flat and sleek exterior allows it to be installed underneath the sink, saving countertop space. The device status and parameter readings (filtered water purity, the remaining life of each cartridge, filtered water volume, etc.) can be monitored via app, which also sends cartridge replacement alerts and with a connection to a store and delivery service.