It is an electric rechargeable coffee grinder. The professional mechanism ensures the grinding quality of this item. The material of the mechanism is 420 S/S. 7 options of adjustable grinding provides more professional and detailed choices to the customer from Café baristas to coffee lovers and normal customers. You can have different taste from espresso to pour over by choosing different options. Transparent containers on button can help you to observe the size of power easily. One button operation can help you save time to prepare filters, mugs when the grinder is working. Indicator light on the top will twinkle on red when the machine is out of power and only need you to do is connect the machine with computer, car, home socket by USB cable.