This is a Takagi faucet water purifier. Cartridge not included. JA4 series. Used for about 2 years, but it was installed in a place I didn't use often, so I think the frequency of use was about 1 or 2 times a day. There are small scratches, but it works without any problems and is still a usable product. Type: Faucet water purifier Material: Metal Function: Raw water switching function