Some buyers a operating or assembly instructions are missing. This is unnecessary, however, since all connections are clearly marked both on the device itself, as well as on the packaging. With a mediocrity of technical expertise of the installation is therefore also for novices thanks. The splitter can of course only use what it gets delivered from the antenna. So if you have just a normal FM antenna on the roof, so that may indeed received a bit of DAB, but will be quickly irritated by many dropouts. In this case, however, can help direct contact with antenna technology Bad Blankenburg. After the description of my DAB reception problems and the technical situation in the car, handed me from the simple exchange of the antenna rod against a DAB / FM combo bar to bring about improvement here. This is of course in every vehicle otherwise. But as I said: The experts sitting in Bad Blankenburg and find always a solution. E-mail is enough and will be helped. From me, therefore there's a perfect score, both for the splitter, as well as the manufacturer's service.