Tt eSPORTS Ventus R and Ventus Z Review @ Vortez
 

The Ventus R is a high-speed, ambidextrous mouse that is lightweight and features the renowned PWM3310 optical sensor, while the Ventus Z is a larger, ergonomic mouse with additional buttons, adjustable weight and features the AVAGO 9500 laser sensor. Each use OMRON switches, an alps encoder and feature a 32bit ARM MCU and 256kb of memory.

http://www.vortez.net/review.php?id=1212