Topping NX1s Digital HiFi Portable Headphone Amplifier (Black)
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<b>[Product Information]</b><br>
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<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>
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