help identyfing autocom adaptor

[twig]

I bought an autocom active rider intercom kit with some additional bits as a job lot recently from the for sale section. mainly for the actual unit itself as mine packed up. in the box of bits I found 2 of these autocom adaptors with some headsets, (see my other post), but I am not sure what they are for, my guess would be adaptor for in ear speakers, but I really am not sure. I was going to offer them in the for sale section but obviously need to put a description on them,
they are autocom 7 pin plugs and the box is labelled A,B,C with A being a female 3.5mm jack plug
any help with identification appreciated

 

[DC]

Yep that's autocom part number 2129.

It's the extension lead that comes from your helmet to the main autocom system. The box has a 3.5 female socket that takes in ear iPod type speakers and does away with in helmet speakers .

That does look an older version as the newer one has a smaller box on it .
The new one retails at around £35 so you should get £15 per lead