Get the audio signal out of your EK 100 or EK500 (G4, G3, G2 or original series) camera receiver, and into somewhere meaningful with this lead.
Sennheiser locking mini jack on one end, and male 3-pin XLR on the other.
In between is 50cm cable. Simple.
CL100 is a genuine Sennheiser accessory / spare.
