Cougar Minos X5 @ TechPowerUp
 

The members of the Cougar Minos series were thus far more budget than high-end gaming peripherals. The Minos X5, however, is quite an icebreaker in this term, featuring the best optical sensor currently on the market while being reasonably cheap with a $49.99 price tag. It also features fully customizable two-zone RGB lighting, Omron switches rated for 50 million clicks, and a customizable back panel.

https://www.techpowerup.com/reviews/Cougar/Minos_X5/