Infinitely Adjustable Coarseness: Our grinder has an infinitely adjustable coarseness design, which can be controlled by adjusting the coarseness knob. The finest can grind 30 mesh coffee powder (>90%) giving you perfect control over the coarseness of your pour-over, drip, cold brew, espresso, etc. Conical Ceramic Grinding Core: The electric coffee maker uses a high hardness ceramic grinding core, which is not as prone to heat as the blades and is safer and more advanced than the average coffee maker. Ceramic grinding core can reduce flavor loss and extraction of odor, grinding core parts are washable, not easy to residual odor. Easy To Operate: The electric coffee machine is convenient to operate, one key to turn on the operation: the blue light is on to indicate operation, the red light is on to indicate that the power is low and needs to be charged. When there are no coffee beans in the bean box, the grinding will automatically stop. Long-lasting Battery Life: USB-Type C cord charging, global use. 3 hours of charging can work for 1 week: grind 3 times a day, each time grinding medium coarse 25g/0.88oz of coffee beans. User-friendly Design: transparent working compartment design, the capacity of the powder box is clear at a glance. Both the bean and powder compartments are dishwasher safe, making cleanup quick and effective.