Perfect Adjustable Setting: Manual coffee grinder has 3 grades adjustment for coarse,medium or fine by turning the adjusting wheel,clockwise for fine grade and anti-clockwise for coarse grade. Make sure there are no obstructions between the inner and outer burr when turning the adjustable wheel. This is very important when changing from a course to fine grade. Keep the coffee beans are dry before grinding. Hand crank coffee grinder mechanism eliminates over 90% of the noise that electric coffee bean grinders produce. Unlike electric burr grinders for coffee beans, the patented Java Presse dual plated manual ceramic burr coffee grinder assembly requires no batteries, power or long plastic cords to operate This allows you to enjoy fresh ground coffee beans at home or on the go as the best camping coffee grinder.