Det inspirerades av det trådlösa trådlösa nätverket
While they have no need of mundane domestic objects such as dishwashers or vacuum cleaners, some members of the magical community are amused by Muggle television, and a few firebrand wizards even went so far, in the early eighties, as to start a British Wizarding Broadcasting Corporation, in the hope that they would be able to have their own television channel. The project foundered at an early stage, as the Ministry of Magic refused to countenance the broadcasting of wizarding material on a Muggle device, which would (it was felt) almost guarantee serious breaches of the International Statute of Secrecy.
Some felt, and with justification, that this decision was inconsistent and unfair, as many radios have been legally modified by the wizarding community for their own use, which broadcast regular wizarding programmes. The Ministry conceded that Muggles frequently catch snippets of advice on, for instance, how to prune a Venomous Tentacula, or how best to remove gnomes from a cabbage bed, but argued that the radio-listening Muggle population seems altogether more tolerant, gullible, or less convinced of their own good sense, than Muggle TV viewers. Reasons for this anomaly are examined at length in Professor Mordicus Egg's The Philosophy of the Mundane: Why the Muggles Prefer Not to Know. Professor Egg argues cogently that Muggles are much more likely to believe they have misheard something than that they are hallucinating.
(Pottermore - Technology)