1. High Quality Glass -- The manual coffee grinder is made of high quality glass2.Easy to clean--The coffee grinder can be cleaned with a brush or water. Maintaining your coffee grinder can be a tough job. It depends on which type you are using. This manual coffee grinder is easy to disassemble for cleaning. After cleaning, please dry the parts well before reassembling them 3.Super Quiet--The coffee bean grinder mechanism always eliminates more than 90% of the noise produced by the electric grinder. Imagine grinding your favorite coffee quietly in an office cubicle or kitchen while your loved ones are asleep 4. CONVENIENT AND COMPACT--The portable and compact size allows coffee lovers to take it anywhere, this mini manual grinder is perfect for camping and traveling. Make sure you can drink fresh coffee anywhere along with a wonderful view 5. Manual operation -- no need to worry about annoying wires or constantly thinking about whether the battery is working. Our manual grinders grind easily so you can get perfectly ground coffee beans in minutes