The SCP Foundation has contained headphones that can connect to any radio on the planet regardless of distance. The downside? It can also play cognitohazards in such a way that it can render someone dead in just a 6 words. And it can spread by anyone who knows the hazardous words.
A standalone but interesting SCP.
Source: scp-wiki.wikidot.com/scp-3115
Author: ResearcherKatash
SCP Foundation: scp-wiki.wikidot.com/