DESC: The correct EST (Eastern Standard Time) has been preset at the factory, so just plug the clock in and adjust the time zone as necessary. In the case of a power interruption, the built-in Lithium battery maintains the correct time so you don't have to re-set the clock. When Daylight Savings Time changes take place in the spring and fall each year, there is no need to adjust the clock because the built-in calendar recognizes the dates and automatically makes the proper time adjustments. Dual Alarms with Alarm Indicator permits two separate wake-up times with individual wake-up settings and confirms that the alarm has been activated to turn on at the pre-set time. Choose your own snooze time instead of being held captive by the short time intervals of other snooze times. Each press of the snooze button adds an additional 10 minutes to your total snooze time for up to a full hour of uninterrupted sleep.