Product reviews for Electric Desk Alarm Clock Silver AC9V 

Includes battery compartment for backup use of 9V battery sold separately, so that you'll always have the time even if the power goes out! Prominent golden LED numerals set in black background and metallic silver case. Backup battery keeps time in case of power outage. Can set alarm with confidence, knowing that there are two power supplies in case one fails. Stylish design looks great in almost any room. Time Format Standard Power Sources AC or 9V Battery Sold Separately Movement Type Electric Overall Diameter NA.