https://www.pcgamer.com/cooler-master-mk850-review/

The gaming keyboard market is flush with product these days (which can make it a challenge to find the best gaming keyboards), and a lot of these decks come bundled with some flashy gimmick that's designed to move units. The sad reality, however, is that the majority of these gimmicks end up either not working as intended / advertised or are a silly idea from the outset, and either add zero value to the plank or actually detract from it. 

Rarely, however, these unique add-ons actually justify the additional figures they add to a price point, and such is the case for the Cooler Master MK850 with its analog Aimpad tech. A selection of keys use IR sensors paired with the board's Cherry MX Red switches to detect exactly how far down you've pushed a key, so fine control is possible in stealth, racing, or flying games, or any other situation where the range of control provided by an analog stick is preferable to the hard binary normal keyboard keys provide. The MK850 takes steps towards eliminating the gamepad as a necessary peripheral for a lot of PC games, and I fully support any effort to help declutter my desk.