That is what is so good about this pad. There is no 2 hour shut off, so you don't need a "stay on" setting. It is on until you turn it off.Um, I just went to the link you provided (thank you!) and I see that this heating pad has a 2 hour auto-off feature. I don't see any setting on the control to by-pass that so that it stays on continuously, which means you'll have to restart it every 2 hours. That will be a problem, and it's why we stress making sure that the pad can be set to "stay on".
This is the control on the pad that I and most others are using.
Seems the link I posted when to a group of heating pads, not the one that I was talking about. Try this link instead. Hopefully it posts right this time. In case you can't find the pad, the pad # 000771-810-000.Yep...that's what I see too.
I didn't double check it earlier before posting. I was in a hurry to leave. It's my daughter's birthday and we took her out to eat seafood for her birthday.

I've had this pad on and running since Friday morning with no problems. It stays on, doesn't shut off. The only thing I've done is adjusted the temp.