Logitech M570 Laser Long Range Wireless Trackball Computer Mouse + 2 AA Alkaline Batteries + HeroFiber Ultra Gentle Cleaning Cloth<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"> This Bundle Includes: Logitech M570 Wireless Trackball， Logitech Unifying receiver， 1 AA battery (pre-installed)， Additional 2 AA Alkaline Batteries &amp; HeroFiber® Ultra Gentle Cleaning Cloth， User documentation </span></li><li><span class="a-list-item"> Trackball comfort: Your trackball stays in one place， so you don’t have to move your arm to move your cursor </span></li><li><span class="a-list-item"> Precise cursor control wherever you want to use it - Hard tables， comfy sofas and lumpy beds </span></li><li><span class="a-list-item"> Easily connect up to six compatible wireless devices—keyboards， number pads or mice </span></li><li><span class="a-list-item"> Advanced 2.4 GHz wireless connectivity with a range of up to 30 feet (10 meters). For Windows or Mac OS </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/51zT%2Bdy%2BYeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51wHdt0-ROL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51honnwg%2BLL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41KFz94sstL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41XdvfLVEtL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/514UoCveM7L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51UQ0evtsXL.jpg" noproxy>