Topping NX1s Digital HiFi Portable Headphone Amplifier (Black)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>40 hours long play back time;</li><li>Full aluminum case;</li><li>Micro USB charge port;</li><li>Intelligent charging with battery indicator</li><li>TOCOS potentiometer;</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41gsTrUL89L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31vHHgLnzXL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31PYAzRGRnL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31NEyAdwZYL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Uh6jt18SL.jpg" noproxy>