Logitech Cordless TrackMan Wheel<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Trackball allows fast and easy scrolling </span></li><li><span class="a-list-item"> Features digital radio technology </span></li><li><span class="a-list-item"> Patented optical technology </span></li><li><span class="a-list-item"> No line of sight necessary between mouse and receiver </span></li><li><span class="a-list-item"> 5-Year warranty </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41NPPK37JCL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41FQB27Z7AL.jpg" noproxy>