. Never lose a gaming session because of hand strain again. The Lenovo M500 gaming mouse sports a performance design engineered around great ergonomics giving your hand superior comfort by optimizing the palm gripKey Product Info . Stay comfortable and healthyCustomize on the fly Product Features Stay comfortable and healthyWith unprecedented textured side-grips the Legion M500 keeps your hand well-rested in the palm grip position saving your accuracy in today\'s gaming session and your health long term. Customize on the flyMake the design yours with three RGB color LED zones and set perfect accuracy for every game via removable weight cartridge and on-the-fly DPI switch with three onboard profiles.