Sony ICF-C112 AM/FM Clock Radio (Discontinued by Manufacturer) Confirms that the alarm has been activated to turn on at the pre-set time Select the volume of the alarm to high or low Analog AM/FM tuner lets you choose from the wide variety of radio talk and music programming Uses a single 9V battery (optional) to maintain clock and alarm operation in event of blackout or other power failure Snooze and Sleep Timer functions either shut off the alarm temporarily to allow for a few extra minutes of sleep before the alarm turns on again, or shut off the radio after a pre-set length of time