The Logitech 953695-0000 SBF-96 Optical Mouse features state-of-the-art optical sensors which provides the smoothest tracking on most work surfaces. Its contoured shape is designed for comfortable browsing. The Logitech 953695-0000 SBF-96 Optical Mouse has a built-in scroll wheel that allows easy navigation of large documents and websites in all common applications. Connectivity Technology: Wired Interface: PS/2 Movement Detection Technology: Optical Buttons Qty: 3 Movement Resolution: 400 dpi Features: Scrolling wheel