@Albert2205 That's a valid concern. Many hosts have had their listings suspended because guests reported recording devices that were either not there or fully disclosed.
Aside from that, I can only speak for myself but I'm not a fan of motion sensor lights indoors. I can't even count how many times I've been in a bathroom and the light suddenly turned itself off, and I had to wave my arms around like a lunatic to stop being there in the dark. I can see putting a timer on the fan, but I think most guests would prefer a normal light switch.