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Sudoku Key Chain

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6 x 6 Electronic Sudoku with Key Chain
Input six numbers from 1 to 6 to a square with size 6 x 6, and avoid number repeating either in each line or each column
Pause and auto-save feature
2 levels of difficulty
Game timer
Sound on/off
included stylus to select square and number
One million random puzzle
Take 1 CR2032 battery (2 included)
Screen Size: 3.5 x 3.0cm
Dimension: 6.7 x 4.7 x 1.5cm
Weight: 37g

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