OP ELITE MSE 5BTN SCROLL USB PS/2 PC MAC Ultra high-speed precision. Maximum control. Never has "point-and-click" been easier. The Kensington Optical Elite mouse uses state-of-the-art optical technology and an exclusive Kensington design to provide smooth, effortless tracking. Ultra high-speed optical sensors detect movement on almost any surface, and with no moving parts, no cleaning is necessary. With Kensington optical mice, you get power, comfort, and the assurance of high-quality devices.