Product Name: Kakuro Puzzle Game with 5 Levels and LED BacklightModel Number: TTD0501Place of Origin: ChinaSudoku was hot, now comes Kakuro. Think of them as the mathematical equivalent of crosswords. A Kakuro consists of a playing area of filled and empty cells similar to a crossword puzzle. Some black cells contain a diagonal slash from top left to bottom right with numbers in them. The object of a Kakuro is to insert digits from 1-9 into the white cells to total the clue associated with it. However no digit can be duplicated in an entry. For example the total 6 you could have 1and 5, 2 and 4 but not 3 and 3. Sound simple? Be warned it get hard and is as addictive as Sudoku. Display: 1) LCD screen, 51 x 55mm 2) With LED backlight Game functions: 1) 5 levels of difficulty 2) Auto-solve functions 3) 3 Helpful hints available 4) Sounds for exciting play Function keys: mute, L/C, up / down / left / right, reset, on / off, 1 to 9 number pad, help, check, S/P, LED back light switch Power supply: 2 AA alkaline batteries (not included) Rules: Kakuro puzzles resemble crosswords which use numbers instead of words. The aim of the game is to fill all the blank squares in the grid with only the number 1-9 so that the number you enter add up to the corresponding clues. When the grid is filled, the puzzle is complete. Packing: Color box 60pcs/ctn Carton dimensions: 61.8 x 33 x 38.8cm N.W.: 12.1kg G.W.: 13kg