The G90 gaming mouse uses Invisible Optic technology that can't be seen by the human eye.
If you're not sure if your gaming mouse is getting power from the USB port, do the following:
- Connect the mouse to your computer.
- Move the mouse around.
- If you see the pointer move on-screen, your mouse is being powered through the USB port.
- If you don't see the pointer move on-screen, make sure your mouse is securely and directly connected to a working USB port.