Sony MDRXB50AP Extra Bass Earbud Headset (Black)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Sensitivity (db): 110 dB/mW </span></li><li><span class="a-list-item"> Frequency Response: 4 - 24，000 Hz </span></li><li><span class="a-list-item"> Microphone: Elecret condenser / Omni Directional </span></li><li><span class="a-list-item"> Remote Control: Multi-function button / SmartKey app </span></li><li><span class="a-list-item"> Plug: Gold-plated four-conductor L-type stereo mini plug </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31O0Auv0ucL.jpg" noproxy>