FM/AM Digital Tuner: lets you choose from a variety of radio Programming. Dual Alarm: permits 2 separate wake-up times with individual wake-up settings and also allows you to wake to a CD, the radio or a buzzer ATS (Automatic Time Set): The correct EST (Eastern Standard Time) has been preset at the factory so just plug in your radio and adjust the time zone if necessary. In the case of a power interruption, the pre-installed Lithium battery maintains the correct time so when the power returns you don t have to re-set the clock. ADST (Automatic Daylight Savings Time): 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 adjustment. No Power No Problem Alarm System: uses the pre-installed Lithium battery to maintain clock and alarm operation in the event of a blackout or other power failure.