The electric grinder makes freshly ground coffee very easily. It is charged using the USB-C cable that is part of the product. There is no need to insert any batteries into the grinder, which saves you money. The grinding coarseness can be adjusted using the thread on the ceramic grinding mechanism (clockwise for fine grinding, counterclockwise for coarser grinding). So everyone can choose the coarseness of the ground coffee very easily and quickly. To turn on the grinder, press the on/off button and after grinding the required amount of coffee, turn the grinder off in the same way. If the coffee container is empty, the grinder will stop working on its own. You fill the grinder with coffee by lifting the top cover. By turning the lower container 180° and putting it back in place, you will have space for ground coffee. The green light indicates that the grinder is in operation. The red light indicates that the grinder needs to be recharged. When charging, the red light on the power button lights up on the grinder, once the battery is fully charged, the power light turns green. Instructions are included in the package. Material: ABS plastic, PMMA plastic (polymethyl methacrylate), silicone (button and anti-slip pad), ceramic grinding mechanism, metal. Dimensions: 8x5.5x16 cm, cable length 1 m.