Amazing build quality and fast shipping
Matches the description well. This is an IEC-60318-4 compliant coupler for In-Ear Monitor measurement. I bought the one without the microphone, only the coupler. Behind the coupler is 1/2" hole to fit 1/2" measurement microphone. I tried with MiniDSP UMIK-1 and it fits well. Inside the hole it has 2 rubber gasket to provide seal with the microphone. Good quality coupler and very responsive seller. I had a chat with him before bought this coupler. Message the seller if you're not sure what you need. He is very helpful. Recommended!