... intensity is wider,the alkalescency 4 segments can be set into strong,middle,weak velocity.4.User can adjust ... . If the water quality is good, you can set more liter of the waterflow which affect the using ... the water quality is not good ,you can set less liter of the waterflow.5.User can adjust ... If the filter element and abluent waterflow reach the set number, it will remind you of changing the filter ...