Everything works fine. The PCB and parts quality are quite acceptable.
Very fast, only 12 days door to door (Holland) delivery -> Exceptional performance! Product looks very professional, well finished board, high quality components. I am missing the accurate connection details, especially the STB and +PREVCC connections it is not clear how to connect. Description on website says: "4. ACC is the switch line, the power supply positive indicator LED light is on, the power amplifier works; the ACC is not connected to the LED is not lit, the power amplifier is turned off. ACC boot line compatible with car control signals" -> but there is no ACC, just PREVCC and STB on the input side -> please explain how to connect also on your website!!