If you're wondering why 12,000 DPI (or CPI, if you prefer) has any relevance whatsoever, the counts per inch that a sensor interprets actually impacts more than pure mousing speed. The G502 can save profiles on-device, so moving to new PCs isn't an issue here. As always, all buttons are controlled through the Logitech software. The button found between G9 and the scroll-wheel is a mechanical switch and does not provide input to the system.
Of most immediate interest, the mouse offers 11 total buttons: Three on the thumb grip, two additional buttons near LMB (this is one of the best spots for MMO buttons, in my testing ), LMB, RMB, MMB + left/right scrolling, and a button below the scroll-wheel toggle. Specs first, as always: Logitech G502 Proteus Core Mouse Specs Resolution Seeing Logitech move away from such features while still achieving high speeds is refreshing. These items throw off the predictability and dead-precision that a gamer demands of a high-quality mouse (acceleration is especially noticeable in RTS and FPS games). The new Logitech G502 Proteus Core Tunable Gaming Mouse - yes, that's its name - lays claim to hosting the first 12,000 DPI sensor in the industry DPI is often used as a marketing metric, and is so-used here to some extent, but the G502 lacks any undesirable mouse acceleration, smoothing, pixel rounding, and snapping that many high-DPI mice use. In the very least, the company's mice have proven durable and formidable in the marketplace. I've had issues with their headsets in a distant past, but haven't yet had the chance to get hands-on (heads-on?) the newer audio peripherals. Contributor Patrick Lathan's look at the G500s had similarly-high praise. Logitech (NASDAQ: LOGI) has thus far had a pristine track-record in our mouse reviews my review of the G700s sincerely claimed the mouse to be the most comfortable, best gaming mouse I'd ever used.