ROCCAT KONE XTD - Max Customization Gaming Mouse, Black (Certified Refurbished) [Windows] This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty Eight fully-programmable buttons and a tough-built 4D mouse wheel for the optimal amount of combat control Perfectly-weighted design and soft-touch, ultra-comfort surface allows for smooth, cozy and rock-steady gaming sessions Features 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 with cool effects, like a "breathing" function, or color rotation 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