Microsoft IntelliMouse Optical is one of Microsoft's best-selling optical mice, featuring a versatile ambidextrous design and supercharged with Microsoft's new proprietary IntelliEye optical technology - the most powerful in the world. IntelliMouse Optical features silver detailing, Microsoft's signature glowing red underside and taillight, and ergonomic enhancements to provide comfort for left- and right-handed users. Microsoft's IntelliEye optical technology marks a major milestone in the optical mouse category, taking mousing to the next level and giving IntelliMouse Optical unprecedented performance, accuracy and control.