I'm really satisfied with my purchase! It's cheaper than a Fiio E07K (but also much less visually classy and the touch) but it's better the work of a sound point of view. Certainly because of the presence of a chip ES9023 SABRE, which gives a neutral rendering, but paradoxically very catchy, with great speed, separation WONDERFUL instruments and voice, and spatial slightly disorienting at first listening. Nothing contained, everything is expressed accurately and grandeur. In short compared to Fiio products while widens, all lights, we finally found a sound devoid of congestion effect, especially in the low end. In contrast, no battery, so it will have to do that sedentary.