I need a recommendation for a baby monitor that can be used in a multi-story house.

I'm going to PA to visit family soon and the houses we will be at are two story homes with basements. I think baby will be sleeping on the second floor while we visit with family in the basement during the evening. Is there a baby monitor that anyone here uses in such a situation? I don't want it to be a wifi dependent monitor, but I do want video. (I have the nest monitor at home and love it, but want something that's easier to tote around.) I worry about the monitor not working through the multiple floors.

Thank you for your recommendations!