After such a device I've been looking for! The installation is very simple, if you are familiar with the Bluetooth settings of his notebooks etc.. Moreover, it is surprisingly small. All music files (and other sounds) are easily transferred to HiFi systems with analog AUX inputs. I have often heard that a Bluetooth connection can not transmit high-quality to - but I am completely satisfied with the sound quality. To install Apple Airport Express, I would have to convert all my music files in the Apple format - I did not want.
So the Advance Acoustic is the perfect solution for me. Half a star I would, however, deduct for the quality of the material: The power adapter looks like a cheap children's toys, and that with the quite considerable price. That's why I put the equipment into an outlet with switch, so I do not have to strain it mechanically when switching on and off.