The Altus Tabletop Clock is radio controlled and features a solid wood case with mahogany finish. This is the most accurate movement available. Never needs setting because it receives low frequency radio signals from the U.S. Atomic Clock Center in Fort Collins CO which sets correct time automatically. S This clock will set to all U.S. time zones. Automatically adjust to Daylight Saving Time and back to Standard Time. Requires 1 AA battery (not included). Learn more about Desktop Clocks Learn more about Bulova