Wii Remote Has No Volume Controls — Use TV/Receiver or Console Buttons

You can't. The Wii Remote has no built-in volume controls. Audio output is managed entirely by the console and your TV/receiver.

How to Adjust Volume

• TV/Receiver Remote: Use your television or sound system's volume buttons.
• Wii Console Buttons: The front-panel buttons on the Wii (near the disc slot) adjust system volume.
• In-Game Settings: Some games have their own audio sliders in the options menu.

The Wii Remote only controls gameplay input—not system audio.