The Cube Alarm Clock is made up of 4 individual cubes measuring 2" high x 1-1/2" wide x 1-1/2" deep. They can be arranged or stacked in any desired configuration. The Clock features an alarm w/ snooze and the display can be set to either bright or dim. The clock is powered by the included AC power adapter and has the option to use 3 AAA batteries as a power backup should the main power be disrupted.