1. 3X3, 3X4, 4X4, 4X5, 5X5 5 levels; 2. LED backlight display; 3. Automatic check; 4. Game timing; 5. Automatic shut-off; 6. Warning. 7. After SUDOKU is pushed to the market, its derived product KAKURO faces to the world, which has more challengeable games than SUDOKU.  8. It is believed that it will bring a new tide wave. As the entry-level product of KAKURO, G852 has3X3-5X5 5 levels and it is applicable for the youth or player playing KAKURO at beginning. Packing: Clamshell Unit size:11.6X7.2X2.1CM CTN dimensiion:63X44.5X39CM  Boxing Quantity:100 PCS N.W/G.W:13.4/15.0KGS