DGQ Brushed Stainless Steel Manual Coffee Grinder with Conical Burr Mill(6.3" x 3.7",Silver) No batteries, power, or long cords needed to operate your grinder, allowing you to enjoy fresh ground coffee beans on your next camping, hiking, or backpacking trip. Built-in adjustable grind selector ensures you have 100% control over the coarseness of your Pour Over, Cold Brew, French Press, Aeropress, Turkish, or Espresso grind.Manual grinder for slow grinding,enjoy lifes and enjoy the coffee grinding. Easy to clean, unlike the wooden grinder, it could be clean just with water. Due to the ceramic conical burr, and the sleek stainless steel finish, there is no need to worry about damaging rust. Simply turn the knob clockwise or counterclockwise in order to reach the perfect size for your specific coffee drink. Notice:DGQ brand registered from Amazon.Heat the coffee beans grinding machine with boiled water to eliminate peculiar smell.