Excalibur 747K: Grandmaster Electronic Chess Game: 2 Large LCD Displays with Dual Chess Clocks and Countdown Timer shows your every move, hints, warnings, and scores: 100 levels of play, plus 5 teach modes, 32 book opening trainers, and 32 great games: 1 or 2-person mode with scoring, hints and analysis: Saves game in memory for future use: Powered by 4 “AA” batteries or optional A/C adapter.