A message:

We are currently testing the abilities of recently discovered entities. We'll be calling them "Signalsenders", or "senders" for short.
Our first subject is one we will call "RADIO", due to it seemingly intercepting radio signals around itself.

No matter what, do NOT communicate with it and do NOT assist it with anything.
We do not know what it wants or what it does. It has spoken to us in perfect English.

How does this work?