This is an electric coffee mill. I have confirmed that it works without any problems. It rotates when you close the lid and press down on it. I cleaned it as much as possible, but there may still be some coffee smell and powder remaining. Also, some tape got stuck to the lid during the move, and I couldn't remove it all, so I would appreciate your understanding. I used to have a 20,000 yen coffee mill, but it broke, and I've been using this one since. Of course, it's inferior in terms of the uniformity of the powder and the adjustment of the particle size, but I think it's the best in terms of ease of use and compactness.