Rodent Zero Radar

I have 6 of these in my house, I went up to my summer house yesterday and I found mice droppings all over my counter top. The one unit was with in 8” from were the droppings were

The light flashes constantly so don’t put one anywhere that you want to be dark, like the RV bedroom. Don’t know if they work yet but I’m already disappointed.

Did not get what we ordered by brand name or packaging! Got some Chinese version and we don’t think they even work!