1848cal,
jmaclen has given you the correct answer....several times...in multiple threads.
Have you tried it?
I actually did what he mentions (turn off wireless) by accident, and lost my ML80 connection while out on a hunt...total confusion on the re-pair, until my addled brain finally fired on a couple cylinders, LOL.
Thought for sure I was going to have to dig out the 1/8" patch cable, as I can't stand hunting with external speaker.
good luck,
mike
Edit - When you turn off wireless on detector, first make sure that neither the module, nor ML80s are on.
I've run down the ML80 battery a couple of times, forgetting that it doesn't have an auto shut-off.
If you watch closely, one side blinks (rather faintly) when on.
And, as jma stated...if you're have trouble doing that, then do a full reset...and that unpairs everything.