Cons: the master audio files to WMA (purchased Qobuz) do not function. We must recharge WAV. No manual (I do not know how to tap into a living chain amp). A USB cable without splices provided on industry (unless you have an adapter).
Zeus Audio site that made the sale and to whom I wrote yesterday, just answer me by providing me the references that show that unless I mentioned are well known. He would probably have been more clearly specify before the sale.
Finally, I do not regret my purchase, if only to listen as Master WAV MUSE concert in Rome or violin in Beethoven's Opus 61 (quality FLAC). Pure happiness !!!!