Logitech Superlight 1 Mouse (White)

• Weighing less than 63 grams, it offers near-friction-free gliding.
• Professional wireless technology for fast response performance and strong connectivity
• The HERO 25K sensor provides unparalleled accuracy, speed, and consistency.
• It provides superior accuracy and ultra-precise control for complete confidence.
• The large, add-on-free BTFE feet provide a smooth glide for a pure, seamless connection with the game.

A detailed explanation of Superlight 1 was given by Yazan in this clip:

https://www.youtube.com/watch?v=h_WJ-WumzI4&t=50s