Microsoft Comfort Mouse 4500 (Sea Blue)
Work in comfort, stay in control. Work anywhere with this full-featured  mouse, which delivers comfort in either hand and the precise control of  Microsoft BlueTrack Technology at a great value. BlueTrack Technology, works  more places than ever before, including on granite countertops, carpet—even on a  wood table or a rough, unfinished park bench.Features:   Microsoft BlueTrack  TechnologyWorks on more surfaces than optical or laser technology. Comfort and DurabilityRubber side grips and a contoured shape for either hand. Dust-resistant  design allows you to track confidently. Tilt WheelEasy horizontal and vertical scrolling. Additional Features:5 customizable buttons- Personalize your mouse any way you want.3-year limited hardware warrantySystem RequirementsWindows 7, Windows Vista, Windows XP (excluding Windows XP  64-bit)or Mac OS X v10.4x-10.5xUSB