Yah, not sure Larry, but ThermoPro is not the only outfit that makes those kind of therms. I am sure they won't last as long as the regular kind of remote therms, but they do seem to be fairly durable. Mine didn't die during a cook. I used it last Thanksgiving and that was the last time I used it. Then when I pulled it out Sunday and charged it, it would no longer connect to the base. I don't know if that is a battery issue or electronics or what. But, it doesn't seem like it was directly heat related.