@David-TP thanks for the the reply. That's what I hoped to hear. They are both intended just for plug and play indoors.

I've a 3 pack of XE75 with an outdoor XE50 attached. My son has 3 XE55. We both need to add another node. It's obviously cheaper to buy a 2 or 3 pack rather than individual nodes. Would an XE55 be OK...