Sennheiser HDR120 Supplemental HiFi Wireless Headphone for RS-120 System<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Sennheiser HDR 120 Headphones， Extra Wireless Headphones for RS110 and 120 Systems (charger not included) </span></li><li><span class="a-list-item"> Open， stereo， supraaural， wireless RF headphone. </span></li><li><span class="a-list-item"> Detailed， analytical sound reproduction with strong bass response. Suitable for all types of modern music and TV applications. </span></li><li><span class="a-list-item"> Wireless freedom with reception through walls and ceilings. </span></li><li><span class="a-list-item"> Very lightweight headphones， extremely comfortable to wear. </span></li><li><span class="a-list-item"> Impedance - 24 Ohms </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41x17mSuUIL.jpg" noproxy>