55g Ultra Lightweight rethinks the idea behind expensive gaming mice. A distinctive, incredibly light design that minimizes wrist fatigue and guarantees optimal performance. Ideal for intense first-person shooter games and more! Favorite Pro Shape by Fans Regarding specifications and the classic shape, the enthusiast and professional player community provided extensive input on the design of HELIOS II Pro. Because of its comfort and compatibility with various grip types, this shape is a true fan favorite and ideal for both professional players and gamers. Superior Performance ARM® CORTEX® MCU from Nordic With its high-performance Nordic 52833 ARM® CORTEX® MCU, HELIOS II Pro offers gamers an edge over rivals in their favorite games thanks to its low latency inputs and true 4K polling rate. Exceptionally low motion and click latency!