LAMZU Atlantis 4K @ TechPowerUp
 

The name already hints at the main novelty of the Atlantis 4K: 4000 Hz wireless polling. Equipped with PixArt's PAW3395 sensor and Huano switches for the main buttons, the 4K version also features the improvements of the V2 version, namely differently sized feet and a new scroll wheel encoder.

https://www.techpowerup.com/review/lamzu-atlantis-4k/