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China Keychain Sudoku Manufacturer,Promotional Custom Imprinted Keychain Sudoku,Advertising Keychain Sudoku,discount Keychain Sudoku supplies |
Features: 1) Modes: 6 levels 2) Large LCD screen: 30 x 40mm 3) Every square contains digits from 1 to 9. Multifunction: 1) Hint function 2) Help function 3) Self-setting function Manifold playing: 1) Time: total time is 99 minutes, the shorter the better 2) Step: it can count each step you play, the less the better