SteelSeries Engine Software unlocks an impressive arsenal of Engine Apps that make customization of the 8-zone RGB lighting easy and intuitive. The Discord and GameSense Engine Apps allow for chat notifications, in-game events, and more...The all new center of gravity tuning system includes moveable weights and light-to-heavy customization, delivering the widest range of adjustment of any gaming mouse. The world’s most advanced sensor system, the TrueMove3+ combines true 1 to 1 tracking with breakthrough state-of-the art lift off distance detection. For the first time ever, you are in complete control - even on lift off.The Rival 650 Wireless delivers exceptional charging speed. 15-mintues of charging offers 10+ hours of gaming time. Never again have to charge in the middle of your game.