Sony MDR-ZX300AP/B Stereo Headphones with In-line Microphone and Configurable Remote - Black<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"> Driver Unit - 30 mm </span></li><li><span class="a-list-item"> Frequency Response - 10 - 24，000 Hz </span></li><li><span class="a-list-item"> Impedance - 24 ohms at 1kHz </span></li><li><span class="a-list-item"> Sensitivity (db) - 102 dB/mW </span></li><li><span class="a-list-item"> Magnet - High-energy Neodymium </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/4168BCmOagL.jpg" noproxy>