Alarm Clock Radio Built-In Computer Chip Automatically Acounts For All Time Changes For Nearly A Century A Battery Back-Up System Keeps Precise Time Even In The Event Of A Power Failure Rotary Tuning and Volume Controls. Slide Controls For Band And Alarm Selection Jumbo 1.3" Blue LED Clock Display. Display Dimmer Control Choice Of 3 Alarm Modes: Every Day, Weekdays Only, Or Weekends Only. Dual Alarms Can Be Set And Used Independently. Wake To Radio Or Buzzer Alarm