Bold 3' GFCI 12/3 PowerFlo-TriTap Adapter

Does this have a stated temperature or UL rating?

I’m not staff, but I can at least answer a part of your question …

Under features, “cUL, OSHA approved”.

Also if you zoom in on the second pic, you’ll see the UL mark.

Per the vendor: They’re all UL listed, it’s a -40 degree cold weather jacket.