Non-Slip Key Pad, Up to 15,000 Variations, LCD Screen;Timer, Record of Fastest Solution Time, Replay Mode, Low Battery LED Indicator;Storage Pouch, Battery Back-Up for Memory, Last Puzzle Recall, Sound Effect, Auto Shut-Off;Two (2) Levels of Play - Beginner/Expert;Three (3) Levels of Difficulty - Easy/Intermediate/Hard

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Sudoku 15K The Ultimate Numerical Challenge! eSudokuMade in China