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No optical light visible on the M330 / M331 / B330 mouse

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Your mouse uses an infrared (IR) optical LED light that is invisible to the human eye.

If you're not sure whether your mouse is powered on, check the On/Off switch located on the bottom.

On Off Switch

When your mouse is:
  • ON — The switch is pushed over to the right and you see green next to it.
  • OFF — The switch is pushed over to the left and you see red next to it.

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