Koss UR40 Collapsible Over-Ear Headphones<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Hybrid Design Combines The Best Of Closed-Style and Open-Style Headphones </span></li><li><span class="a-list-item"> Closed Leatherette Ear Cushions Form A Light Seal Around The Ears </span></li><li><span class="a-list-item"> Screened Ear Cups Provide An Open， Hear-Through Sound </span></li><li><span class="a-list-item"> Adjustable Headband Accommodates All Head Shapes and Sizes </span></li><li><span class="a-list-item"> Wide， 15 to 22，000 Hz frequency response </span></li><li><span class="a-list-item"> Titanium-coated， high-polymer diaphragms deliver accurate sound </span></li><li><span class="a-list-item"> Neodymium iron boron rare-earth-magnet structures for accurate sound reproduction </span></li></ul><!--   Loading EDP related metadata  --><div aria-live="polite" class="a-row a-expander-container a-expander-inline-container"><div aria-expanded="false" class="a-expander-content a-expander-extend-content" style="display: none;"><ul class="a-unordered-list a-vertical a-spacing-none"><li><span class="a-list-item">Oxygen-free-copper voice coils for high signal clarity</span></li><li><span class="a-list-item">Closed leatherette ear cushions for maximum isolation and deep bass</span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41yEovxeEZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51YBklDHXZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/91y828LNqBS.png" noproxy></div></div>