High Torque Quartz Clock Movement (For Long Hands), Medium Shaft- Ultra Quiet 7/16" motor size: 2-1/8" sq. x 5/8 thick x 5/16" dia. shaft 7/16" (11mm) threaded shaft, total 13/16" including hand stem requires one "AA" battery (not incl) continuous high torque motor (super quiet), no stepping of gears 3 year factory warranty