Great pump that is very powerful and quiet. The automatic switching is very gentle pumping and can be adjusted individually. The built-in small pre-filter is also good, but who promotes very dirty water, however, you should still install a large pre-filter in front of it, to protect the pump. The display can also set and read the pressure, the flow rate and the delay time. My conclusion: Good-quality, high pressure tank unit in the familiar Kärcher style that this works very quietly.