1. 6 x 6 Sudoku game

2.Randomly generate the puzzles

3.if the system is idle for 3 minutes, it will auto power off. Before
Power off, the existing game will be saved.
4. Time/date/clock 

5. Battery: 2pcs CR2032 batteries operated 

Product size: 8.4 x 4.9 x 1.5cm 
Screen size: 38 x 26mm
Blister card size: 17.8 x 12.0 x 2.2cm