Sony MDRPQ6/Z PIIQ Headphones (Discontinued by Manufacturer)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Ear Cups : Closed， Dynamic (supra-aural)</li><li>Design : Over-the-head</li><li>Sensitivity : 104 dB/mW</li><li>Frequency Response : 8 - 25，000 Hz</li><li>Impedance : 70 ohms at 1 kHz</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31TcudGDsAL.jpg" noproxy>