Rio had a MICROPHONE and a GPS beacon.
Money Heist Season 3, Episode 8
They inserted a MICROPHONE in them,
a Keylock 20-10
Money Heist Season 1, Episode 13
Closer to the MICROPHONE.
The Big Bang Theory Season 4, Episode 2
Full of surprises
with a MICROPHONE in your glasses.
Money Heist Season 1, Episode 6
(MICROPHONE FEEDBACK)
The Big Bang Theory Season 9, Episode 16