- Mini portable designed with keychain- Features 1.7" LCD display- Including 18 puzzle games: 6*6 Sudoku, Magic square, Black and white chess, Whack-a-Mole,Number matching, Falling number addition, 21-point game, Sudoku square, Hold up a number, Guess afigure, Memory master, Memory king, Number-position pairing, Get hit by one shoot, Number mosaic,Number cannonball, Lightning memory and Four-number matching- Best toy for time-killer- Powered by 2 * AG13 battery (included)- Comes with English user manual