Marathon digital battery operated large 17” display clock. Visibility from 30' away. Displays (indoor) temperature in Celsius or Fahrenheit. Calendar displays month, date and day of the week.12 or 24-hour settings. Atomic self-adjusting feature that picks up time calibration signals automatically. Mount on wall or use the built-in stand to place on a flat surface. Main display features 4.7" digits for easy viewing. Sub display and seconds measure 2.1". Includes three C batteries. 16-1/2” W x 1-7/10” D x 11” H. Brushed-aluminum-look plastic frame. Silver.