The E56BAQD304 is 12" RD surface mount quartz battery clock ideal for schools, hospitals etc. Clocks are provided in a round high-impact black plastic case with shatter-resistant safety crystal and bold, black numerals and minute markers on a non-yellowing white dial. Stylish hour and minute hands are aluminum with a black finish and a red sweep hand. Optional bezel colors available. It features a microchip with an internal lithium battery that keeps track of the current date and time. The microchip is programmed to make the daylight saving time change at 03:00 am Eastern, 02:00 am Central, 01:00 am Mountain and 12:00 Pacific time twice a year.