1. [One Button Operation]This mini spice grinder is designed with one button operation, just press the button to start the grinding work and release the button to stop. You just need to pour the coffee beans into the grinder, then twist the lid to make sure it is fastened tightly, then press the button to start working, and finally cut off the power to pour out the coffee powder. 2. [Suitable Size]This electric coffee grinder base has a diameter of 10.5 cm / 4.1 inches and a height of 17 cm / 6.69 inches, which is compact and easy to store. You can hold it with one hand or store it in a cabinet or drawer without taking up too much space. 3. [Transparent Plastic Lid]This 300ml coffee mill grinder is designed with a one-piece inner chamber for easy grinding. It comes with a transparent plastic lid, which allows you to observe the grinding process at any time, making it easy to access coarse or fine powder, which varies in coarseness depending on the grinding time. It is made of stainless steel for durability. 4. [Cleaning and Use Tips]Please don't directly rinse the motor base with water, you can use a brush or dry cloth to clean it, the lid and stainless steel bucket can be rinsed with water. When you are using it, we suggest you take a 1-second break every 5 seconds for easy maintenance of the motor. Grinding ingredients need to cover the blades, but no more than two thirds of the grinding cup.