Koss UR29 Collapsible Portable Headphones<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> High fidelity stereo phone utilizes an anisotropic magnet and 1.4 mil Mylar element for deep bass and treble clarity </span></li><li><span class="a-list-item"> Frequency Response: 18-20，000 Hz </span></li><li><span class="a-list-item"> Collapsible design for protective storage and maximum portability when listening on the go </span></li><li><span class="a-list-item"> High fidelity stereophone utilizes an anisotropic magnet and 1.4 mil mylar element for deep bass and treble clarity </span></li><li><span class="a-list-item"> Frequency Response: 18-20，000 Hz </span></li><li><span class="a-list-item"> Collapsible design for protective storage and maximum portability when listening on the go </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41cEzc-L2PL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/81UZKz5oBYS.png" noproxy>