I have the Garrett Apex with wireless headphones and have had no problems with them. I also have the Pro Pointer with Z-Lynk and like it as well, if for no other reason that you can hear the pinpointer through the wireless headphones. Maybe the transmitter battery went dead and it forgot it's link settings with the headphone? I would make sure you have the on-off switch of the headphones on the same side of your body as the detector/transmitter.
Thanks DIG5050, I talked to the company where I purchased my detector and headphones, ( and alot more, but don't tell the wife ) Wrote a long email to Garrett, and will see how they respond, have their phone number too if I need it. I'm not looking for any of their goodies, just want it to work.! Since 2008 " when I started detecting " I have never sent anything back for a refund or exchange, or repair, but getting older, and the moolah isn't as good anymore, lol.
Hope all in here score big time this year.

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I believe I might of solved my wireless head phone . I decided that the cord to charge the transmitter wasn't lighting up the L.E.D light, but I tried another charge cord, and the indicator light came right on, evidently the other one I was using had something wrong with it. I am still charging the transmitter, but the charging light is still working.
I bet it will work fine once has a full charge on it. Will know sometime later. I hope so, sure beats sending things back to company !! Garrett never did write me back about it.
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