This 15 inch wall clock by River City Clocks is surrounded by textured ceramic rock tiles and is designed to be used both indoors and outdoors. Besides accurately keeping track of time it indicates changes in the humidity and temperature with two instruments located at the bottom of the clock dial. The exact coloration of the tiles may vary slightly from clock to clock. The hygrometer and thermometer instruments may require adjustment to work properly. This clock requires one AA battery to operate (not included). This includes a two year limited warranty covering workmanship and manufacturers defects.