This clock features a built-in computer chip and back-up lithium battery system in case the clock suffers any type of power failure. An easy to read LED display in blue sets in two dimmer settings--light and dark. Automatically resets itself to daylight savings time in multiple time zones, this clock also features dual alarm/sleep/snooze functions. Used for several years, it has some coffee like stains on the top since it sat mostly on top of a microwave. Still works and is in very good condition. Measures 2 1/4" H x 8" W x 5" D. Proper packing and insurance will be issued for the convenience of the winning bidder/buyer.