RDL ST-SH2 Stereo Headphone Amplifier Balanced or Unbalanced Input， Bridge Line Feed Headsets - Power Supply Included<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Stereophonic Headphone Amplifier. </span></li><li><span class="a-list-item"> Provision for External Stereo Level Control. </span></li><li><span class="a-list-item"> Balanced or Unbalanced Input. </span></li><li><span class="a-list-item"> Bridge a Line and Feed Headsets. </span></li><li><span class="a-list-item"> Amplifier To Drive High or Low Impedance Headsets. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41TJh7eD3eL.jpg" noproxy>