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:including 2 Pieces CR2032 batteries.

Product size: 7.2 x 4.8 x 1.8cm 
Screen size: 36 x 31mm
Blister card size: 17.5 x 9.3 x 1.8cm