I don't have a phone or a watch that I can have with me to use as an alarm. Is there something else I can use to practice this? Or some other way entirely?

I have a pocket watch (clock work, absolutely beautiful, no alarm function). Could I use this for the watch RC? Or does it have to be a wristwatch?

If it does have to be a wristwatch, does it have to be a working one? What about one with a piece of tape on it with a random time?

Also, what are the details about how the alarm method is supposed to work? What are you supposed to do?