Large Display LED Calendar Temperature Alarm Clock w/Remote, ATC4004 2.5 " high bold red LED numbers are easily seen Set and control the time, alarm, temperature, and Calendar with a remote control. Calendar displays date and day of the week. Celsius and Fahrenheit as well as 12/24 hours 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. 17" W x 7" H x 3" D 9V battery Back-up (battery not included)