Characteristics and Interoperability Ultra Lightweight 55g redefines the idea of expensive gaming mice. A special, incredibly light design that minimizes wrist fatigue while guaranteeing peak performance. Ideal for fast-paced first-person shooter games and more! Favorite Pro Shape among Fans The HELIOS II Pro was created using extensive input from professional and enthusiast players regarding the design, features, and timeless form. Because of its comfort and ability to fit various grip styles, this shape is a true fan favorite that is ideal for both professional players and gamers. High-Performance Nordic ARM® CORTEX® MCU: The Nordic 52833 ARM® CORTEX® MCU in the Helios II Pro is a high-performance device that can provide gamers with an advantage over rivals in their preferred games by enabling low latency inputs and a true 4K polling rate. Very low motion latency and click latency! Actual Wireless Polling Rate in 4K