Adesso 2.4 GHz RF Wireless Vertical Ergonomic Laser Mouse (iMouse E20)<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"> 2.4 GHz Radio Frequency Wireless Technology This mouse works at any angle with a range of up to 30 ft. with no wires to get tangled. </span></li><li><span class="a-list-item"> Ergonomic Vertical Design The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting. </span></li><li><span class="a-list-item"> DPI Switch Button Quickly and easily adjust DPI resolution for a faster response with the convenient DPI Switch located right beside your thumb. </span></li><li><span class="a-list-item"> Advanced Laser Sensor Advanced Laser Sensor allows greater precision in mouse navigation， increases battery life， and works on more surfaces (such as glassy surfaces) than an optical mouse. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41cF4rILARL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41KT9fsZxHL.jpg" noproxy>