Product review (4 stars): This is a very nice unit!  
Together they worked perfectly the moment the batteries were installed!  The remote unit was placed inside a shed 25 feet from our house.  (The total distance between the base unit and remote is ~45 feet.). As a casual check on the two units' accuracies, I can say that they are consistent with locally reported temperatures and our inside thermostat reading.  The displays are crisp and clear. At this point we can't ask for more.  We're hoping the battery life is good.  We won't know this fact for some time; hense only the 4-star rating.