Manual coffee grinder with ceramic mortar and two containers; adjustable grind size Keep Fresh Coffee Flavor: manual coffee grinder provides professional coffee beans grinding experience. Ceramic burr does not produce excessive friction heat, will not damage the flavor of coffee beans. If you turn the hand crank clockwise, you can feel the beans being broken and ground, release the rounded and intense flavor of the coffee beans. Enjoy the wonderful grinding experience by hand only 4 Adjustable Levels: The knob in the middle of the coffee grinder has 4 grinding levels from fine to coarse, make the adjustment of the powder crudeness or fineness so easy. By slowly turning the handle to crush the beans, the flavor of the beans become stronger and mellow. Durable and Portable: professional coffee grinders are made of materials. The ceramic burr and the stainless steel hand crank are durable and sturdy. And the portable design allows you to take them home, office or anywhere else. Please avoid grinding without coffee beans inside otherwise it will damage the ceramic and the grinder. Easy to Fill:User-friendly designed lids make you fill the coffee beans into the grinder with minimal effort.And It is easy to take it apart and assemble again. It is also easy to clean, just rinsing with water