Tesoro Excalibur SE Spectrum @ techPowerUp
 

The Tesoro Excalibur SE Spectrum features Tesoro's new infrared optical switches co-developed with Gateron. This is a keyboard that aims to take customization to the next level, thanks to the ability to mix and match switches as per user preference. The choice is between linear and tactile/clicky switches that are rated to last longer than traditional mechanical switches with faster response times.

https://www.techpowerup.com/reviews/...r_SE_Spectrum/