Give it a rest, your wrist that is. Mitsumi maximizes your productivity with reliable comfort and function in an affordable PC mouse family. The Mitsumi Scroll Mouse features patented scroll button for smooth panning and fast scrolling with one click. The scroll button on Mitsumi's mouse uses 2 Tactile switches and 1 Micro switch (3 patents pending). This easy-to-use mechanism makes it simple and allows better quality than standard real type scroll. Browse Web pages and documents from top to bottom in milliseconds. For computers with a PS/2 port connection, this will become your favorite mouse! Unmatched continuous smooth scrolling & panning for optimized page movement; Fast scroll automatically with a single click; 2-buttons -- left button textured for convenience in positioning; Textured scroll button for ease of use; Contoured for comfort and ease of use; Molded rubber and easy-to-use mechanism allows for long-lasting comfort and quality; Compatible with Microsoft's Intelligent Mouse; 400 CPI resolution; 1.8 meter cable; PS/2 Interface. 2 year limited warranty.