About this item 【Fast Processing】NS300 Very Simple To Operate,Just Snap The Portafilter Onto The Brush Head,The Brush Head Will Start Automatically,Dispose Of Coffee Puck Quickly, Easily And Cleanly In About 3 Seconds. 【Innovative Design】Many Users Consider It Can Replace For The Espresso Knock Box, It Does Not Have To Hit The Knock Box Hard, Makes Noise And Damaging Your Portafilter. 【Using The Scene】It Has 3 Different Installation Methods, Which Can Be Used In Different Scenes Such As Kitchen, Cafe, Western Restaurant, Outdoor, Festival Party. 【Compatible】There Are 3 Different Types Of Brush Heads,Compatible With Different Sized Espresso Filter Basket. 【Standard Equipment List】Coffee Grounds Bag * 15 、Koonan Cleaning Cloth * 1、Cleaning Head * 3、Power Adapter * 1、The m3 Screw Drive * 1、Black Self-Attack Screw* 15、Vertical Installation Converter * 1、Embedded Mountingnut * 1、Embedded Mounting With a Square Gasket * 1、Open-Hole Auxiliary Drawing * 1、Easy To Tear Down Inner Tank * 1 Yes, it makes coffee making more efficient.