3.5mmm the jack socket can not be connected at the same time as the RCA. the two inputs are simply welded together, it is not a mixer. so if you plug two audio sources at the same time, it is possible that one of the two crame or, in the best case, the sound will be canceled.
the volume button has a hard point when it is turned to the start of its beach. it is a sign that the QA is nonexistent.
good point: received a transformer with 12V while the announcement did not say it.
