"Audio adaptor Sennheiser 4-pin male jack L-R-GND-MIC to 4-pin female jack L-R-MIC-GND - https://en-ae.sennheiser.com/35-mm-mini-jack-adaptor"
Audio adaptor Sennheiser 4-pin male jack L-R-GND-MIC to 4-pin female jack L-R-MIC-GND - https://en-ae.sennheiser.com/35-mm-mini-jack-adaptor