content: A lot of the battery backup alarm clocks only provide for backup of the settings. If the power is out when the alarm is suppose to go off, you're out of luck. This one is different. It has a backup "mini-buzzer" alarm that will go off at the set alarm time even if you have the alarm set to radio. I'm in a situation where I cannot afford to wake up late. It's comforting knowing I don't have to worry about the power being out and the alarm not sounding.