ROCCAT ROC-11-810 KONE XTD - Max Customization Gaming Mouse With eight fully-programmable buttons and a tough-built 4D mouse wheel, the Kone XTD offers the optimal amount of combat control in a clean, uncluttered space giving you swift access to all the command options you need to dominate any skirmish. Whether you prefer to game like a heavyweight, a lightweight, or somewhere in-between, the Kone XTD's four easy-to-clip-in, 5-gram weights let you pick the weight thats right for you. Giving you the power to pack a massive amount of quickly-accessible control into a clean, uncluttered space. Driver software lets you easily program and fine tune a multitude of settings Comfort is essential when you're gaming and the Kone XTD delivers. Perfectly-weighted design allowing for smooth, cozy and rock-steady gliding the XTD features a soft-touch, ultra-comfort surface that lets you game long without the slightest irritation. Flanking its sides are two shimmering light rails powered by four independent multi-color LEDs that you can set in your choice of a wide range of vibrant hues. You can even program the light rails to execute cool effects, like a "breathing" function, or color rotation in your choice of shades or to signal game profile changes. ROCCATDRIVER + MACRO MANAGER for advanced customization plus presets for games and apps. ROCCAT ACHIEVEMENTS DISPLAY for monitoring gaming performance System requirements: Windows XP/Windows Vista 32/64-bit/Windows 7 32/64-bit , Windows 8 / Windows 8 Pro, USB 2.0 port, Internet connection for driver installation