https://www.pcgamer.com/hyperx-upgrades-its-pulsefire-fps-mouse-with-a-better-sensor-and-rgb-lighting/

HyperX today announced the Pulsefire FPS Pro RGB, its third gaming mouse in just over a year, and its second in the Pulsefire FPS series.

What sets the Pro model apart from its predecessor is the optical sensor. For this newest model, HyperX plucked the Pixart 3389 sensor from its Pulsefire Surge and plopped into the same frame as the Pulsefire FPS. It then added RGB lighting and tagged it with a "Pro" designation.