Bytech BTOTGBK / BT-OTG-BK / BT-OTG-BK Miniature Portable Speaker (Black)<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Speaker Output Power: 2.8W </span></li><li><span class="a-list-item"> Impedance: 4 Ohm </span></li><li><span class="a-list-item"> Frequency Response: 100 - 20kHz </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31rIdt51cLL.jpg" noproxy>