Rely on its self-setting accurate time and automatic DST change Easy to set Atomic clock from Pacific to Eastern time zones Simple set and Single AA battery operation When you read a clock, you want to be sure it shows the correct time. With La Crosse Technology's Atomic Analog 10-inch Wall Clock, you can remove all the hassle and worry if the time is correct. This radio-controlled analog clock automatically sets to the exact time, accurate to the second. It has four time zone settings, and it automatically updates for Daylight Saving Time (on/off option). Operating this wall clock is easy. Simply insert one AA alkaline battery into the clock. After the signal is received, press the Time Zone button to set your time zone. Use the manual reset button if you.