Name Sudoku Game Player Model No. T688A Product Description Function: 1) help and play game setting functions; 2) number hint prompt; 3) four hints are available; 4) 1 million random puzzles included. 5) display: LCD screen,39 x 54mm 6) game functions:2 levels of game play 7) power supply:2 x AAA alkaline batteries (not included) 8) rules: Fill in the grid so that every row, every column, and every 3 x 3 box contains the digits 1 through 9, and there is no any repeat number for each row and columninner