Product review (5 stars): Great product!
I purchased two of these three sensor units. One unit is for my home while I'm away in Florida for Jan, Feb & March. The other is for my motor home. We have 3 dogs traveling with us and want to make sure the air conditioning or heat doesn't go over or under preset limits when we go out for a few hours.  The units send me a text message if anything goes outside my preset limits. Great peace of mind!