They inserted a MICROPHONE in them,
a Keylock 20-10
Money Heist Season 1, Episode 13
(MICROPHONE FEEDBACK)
The Big Bang Theory Season 9, Episode 16
Well, not right now, but we could
try out that MICROPHONE you got us
The Big Bang Theory Season 9, Episode 20
Full of surprises
with a MICROPHONE in your glasses.
Money Heist Season 1, Episode 6
Rio had a MICROPHONE and a GPS beacon.
Money Heist Season 3, Episode 8