Large Display Round Wall Temperature Alarm Clock w/Remote, ATC1009 2.5 " high bold red LED numbers are easily seen Set and control the time, alarm and the temperature with a remote control. LED dot seconds counts from 1 seconds to 59 seconds up to a minute. Celsius and Fahrenheit switchable either by remote or manually. Manual button setting is available at the rear of the clock case Full alarm function with Alarm on indicator. PM dot LED indicator is easy for setting time and alarm. Diameter: 11 inches 4 x AAA battery Back-up (battery not included)