EB Excalibur XC5553BK93ABL Game Time II Chess Timer Play Chess, Checkers, Backgammon, go, Scrabble, or any board game with the same excitement found in a tournament play. Two precision digital clockseach with superlarge, easytosee displayskeep spiltsecond track of the time each opponent has used. Game Time is the only timer officially endorsed by the U.S Chess Federation! Official Clock of the USCF.Requires 4 AA alkaline batteriesAge Requirements 7