Full Details on Amazon.com : http://www.amazon.com/gp/product/B0000659BP?tag=tsukuyomi-20<br /><br />Logitech WingMan Strike Force 3D (USB)<br /><br />Durable optical technology provides smooth precision and resists dirt eliminating the need for cleaning <br />Large finger-operated trackball is easy to use offers superior control and reduces hand and wrist movement <br />Sleek shape is flexible enough to use in either hand <br />Limited 3 year warranty
