Your RGB mousepad is not the problem.

No, not really.

The LEDs in a mousepad draw power over USB and produce light. They don’t transmit anything on 2.4GHz or Bluetooth frequencies. Interference would require a radio transmitter or a poorly shielded device dumping noise into those bands — which a strip of RGB lights just doesn’t do.

The rare exception: an extremely cheap, badly built mousepad with a noisy power circuit could theoretically emit low-level electromagnetic interference, but this is more of a lab curiosity than a real-world issue. In practice, if your wireless mouse is stuttering, the culprit is almost always the mouse itself (low battery, driver glitch, dongle plugged into a USB 3.0 port right next to another high-speed device) or your desk environment (metal surface, thick USB hub).

Worry about your mouse and your USB port placement. The glowing mat is innocent.