HIFIMAN Edition S Open/Closed Back Foldable 18 Ohms Dynamic On-Ear Headphones<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Style:Open/Closed Back Design(Interchangeable);Fit: On-Ear;Driver size: 50mm;Dynamic Impedance: 18 Ohms </span></li><li><span class="a-list-item"> Portable and foldable </span></li><li><span class="a-list-item"> iOS/Android In-line Cable </span></li><li><span class="a-list-item"> Optimized cavity </span></li><li><span class="a-list-item"> Asymmetrical Ear cups </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ncyM-nRML.jpg" noproxy>