Sharp Dual Alarm with Jumbo Easy to Read 1. 8” White LED Display with Black Finish – 3 Step Dimmer Control. Extremely large 1. 8” display shines through the black finish. You may adjust the display brightness to your viewing pleasure with the three-step dimmer control button. This is a bright clock, but you are able to easily adjust the brightness. Dual alarms allow you to set two separate Alarm times; for example, set one alarm for the weekday and the other for the weekend. You can clearly see when the alarm is active when the alarm indicator is lit on the display. This clock is electric operated; the battery backup does not power the clock. The battery backup is used for storing the time and alarm settings if the power is interrupted. During battery backup the clock’s display will not be lit. Once the power is restored the display will re-light. Check the time to make sure it is accurate and re-set if necessary. Battery Backup requires 2 x AAA batteries (not Included)