In this article, you'll learn how to adjust the time, volume, or screen brightness on Game & Watch: Super Mario Bros.
Note: The volume level can be configured differently for the game mode and clock mode. However, the screen brightness level will be the same for game mode and clock mode.
Complete these steps
Press the POWER Button once. The screen will light up.
Important - If nothing is displayed on the screen, the battery level may be too low. Ensure to charge up the system, then power it on
Press the TIME Button to display clock mode.
While the time is displayed (clock mode), press the PAUSE/SET Button.
Use the +Control Pad to adjust the volume, screen brightness, and time.