Features: 1) LCD display area: 53 x 77mm 3) Time and date function 4) Alarm function 5) Game function 6) Sound hint 7) Million puzzles for you to conquer 8) Power control: at game mode, auto power off after 8 minutes without operation / manual power on and off 9) Power supply: 2 x AAA alkaline batteries 10) Dimensions (L x W x H): 78 x 145 x 22mm 11) Weight: 103g (without battery)