
for their communication
through the RADIO or telephone
Money Heist Season 1, Episode 1

Radio!
Money Heist Season 3, Episode 8

There are screens
and RADIO devices everywhere.
Money Heist Season 3, Episode 7

Without phones or RADIO frequency,
with nobody being able to hear us.
Money Heist Season 1, Episode 1

(MIMICS RADIO STATIC)
The Big Bang Theory Season 6, Episode 2