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PC35-RJ9X

1. Plug your dual 3.5mm headset into the PC35 ends. Match the microphone and headset cables.

2. Plug the RJ9 end of the adapter into your phone's RJ9 headset jack.

3. Switch through the different channels and find which one gives you a clear connection!

YouTube:

https://www.youtube.com/watch?v=2T2eDTE5Q8M&t=14s

Headset Adapter Finder