Apple Mighty Mouse<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"> Optical， USB 2.0 (compatible with USB 1.1) mouse </span></li><li><span class="a-list-item"> Touch-sensitive technology concealed under the seamless top shell， you get the programability of a four-button mouse in a single-button design </span></li><li><span class="a-list-item"> Force-sensing side buttons </span></li><li><span class="a-list-item"> Revolutionary 360 degree Scroll Ball lets you move anywhere inside a document， without lifting a finger </span></li><li><span class="a-list-item"> Compatible with Mac OS X (programmability requires Mac OS X v10.4.2 Tiger or later)， or Windows 2000 or Windows XP </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/318D41WBWDL.jpg" noproxy>