Microsoft Pro IntelliMouse @ TechPowerUp
 

Behold! The one true heir to the Microsoft IntelliMouse Explorer 3.0 has arrived: the Pro IntelliMouse. It has the exact same shape as its predecessor, which is great news for many people who loved the original. It features a top optical sensor, Omron switches rated for 20 million clicks, and an RGB tail light.

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