1.About Sudoku: Sudoku is the addictive number puzzle game that has taken the UK by storm and is now taking over the rest of the world.
2.It is branded by many as "the hottest puzzle since the Rubiks Cube"
3.Studies show that playing Sudoku can improve memory, mind clarity, and even stop and prevent brain illnesses such as Alzheimer and Parkinson
4.Therefore there are some scientists & researchers recommending playing Sudoku, as part of our regular daily activity.
5. Function keys: Enter key; Number key; Up/Down/Left/Right key; ON/OFF key; Start key; LED key; Grade key; Reset key; Sound key
6. Display: LCD screen (53.9 x 47.1mm)
7. Power supply: 2 AAA alkaline batteries (not Included)
8. Blue color LED backlights