DEWEL European Style Gear Wall Clock with Calendar/Creative Home Decoration Clock (Black) This fantastic wall clock has many gears spinning quietly nonstop 24 hours a day. All gears are made of plastic and the main unit is made of steel. Nice decoration at home or office. You can read the date and month on the 2 little wheels on the center and the time on the large wheel. (Month wheel rotate manually once a month. Date and time rotate automatically.)