I finally found one, you many already have one and never use it for embroidery. For me I just couldn't find one at a price I was willing to pay for one.
I know you are wondering ... a Baby Monitor for $10.00 .
I now can leave my sewing room ( lucky to have one ) and go off to another place and listen. If you are like me , worrying something is going to wrong , now I can I just listen to the sound of a gentle heart beat, until I hear the sound that something is wrong , it can be a grind , a squeak now I can jump to action to fix the problem.
So who else uses one? So far I am loving it!