Product review (3 stars): All different readings...
Just opened the boxes and installed the batteries.  Set them on the bar between the kitchen and living room.  I saw a few posts that said multiple of these would show different readings, so I tried this first.  As you can see by the picture, it's true.  Apparently these are not all calibrated the same.  While the differences are slight, it's still a difference.  So, which one is actually right???