@efa2e20e @81cbe52e it’s a old Sure wireless transmitter unit, commonly called a …….
Butt-plug but you knew that already didn’t you, naughty boy 

 @dcf1b31e @efa2e20e Is it a shure? I was thinking it was a Sennheiser G3. 

https://www.adorama.com/us1678176.html 

 @81cbe52e 

Thanks