Three criteria really matter for CS2, in this order:

  1. Sensor tracking under 4-6 m/s movement: pros hit very fast mouse movements especially during AWP flicks. Sensors with low IPS (inches per second) lose counts in that range. HERO 2 and Focus Pro 35K are both spec'd at 750+ IPS — sufficient.
  2. Weight under 70 g: studies show measurably better reaction times with lighter mice, because the stop-aim phase has less inertia to overcome. Under 60 g it becomes noticeable — under 50 g only matters for hardcore pros.
  3. Wireless stability on LAN: at tournaments with 100+ wireless mice in the room, weak 2.4 GHz connections drop. Logitech and Razer solved this in 2023; cheaper wireless mice often fail right here.

What does not factor into our rating: RGB lighting, software features like macros, number of side buttons. For CS2 you need a standard 5-button layout. More is nice-to-have, not a rating criterion.

Cross-reference with our pro database: all 50 HLTV top pros have been checked for their current mouse. Mice that appear in the top 10 multiple times get a "pro user" tag in the comparison matrix.