We took a look at the landscape of high-performance mice and felt we could do a better job. So we did. The SteelSeries Rivals performance reigns over the competition thanks to a cutting edge sensor, newly developed switches engineered by SteelSeries, and a suite of tweaks to give you the edge over your rivals. At the heart of Rival is the Pixart PMW3310 optical sensor. The 3310 promises zero hardware acceleration, offering true 1:1 tracking and precise movements no matter how fast things get during the heat of battle. The CPI is best-in-class with adjustments from 50 to 6500.