One can clearly see that some people can not read. The device is a professional milk frother I use the part now for over a year and have certainly done in my bowling Bistro over 2000 Latte Cappucino etc.. The best milk froth the world has ever seen. For home just the smaller plastic Maschinchen from the same manufacturer. For cleaning there are proffesional milk foam cleaner then it's easy. And who does not have the maximum Fills the amount nothing drips onto the engine. For professionals highly recommended without restriction.