Amazon.com: Logitech G502 Proteus Core Tunable Gaming Mouse, 12,000 DPI On-The-Fly DPI Shifting, Personalized Weight and Balance Tuning with (5) 3.6g Weights, 11 Programmable Buttons, Fully Customizable Surface : Video Games
Logitech upgrades its Proteus Spectrum G502 gaming mouse ... with colored lights | VentureBeat
Logitech G on Twitter: ""Here's the small miracle that Logitech pulled it off: The G502 Lightspeed, though completely redesigned internally, is a dead ringer for the old G502 Proteus Spectrum." - @FreedmanAE
Logitech G502 Lightspeed review: The Swiss Army knife of mice | ZDNET
Logitech's G502 Proteus Core can run at 12,000 dpi: just because you can doesn't mean you should | PC Gamer