MCAPOWER Descaling System for Washing Machines and Dishwashers

It is a nice little block that can be placed between the tap and the hose. You don't have to leave it for the price. Certainly not if you buy a washing machine or dishwasher worth half a month's salary and do the installation yourself. Unfortunately, nowhere on the internet can I find out how it works and why. I posted it, but I have little confidence that it will actually work. Mainly due to a lack of scientific evidence on how it works and you can only see after years whether you really have less limescale in your washing machine by removing the element and comparing it with your neighbor who has not done it. I can only rely on positive reviews from users, but no one has come up with a scientific explanation about how it works (unlike other systems). Time will tell if it works, or if this just turns out to be genius marketing. In any case, there is nothing noticeable in the short term.