Product review (5 stars): My first placement location outside did not have good airflow and so unit read 5-to-10 degrees warmer
Bought a $2 indoor/outdoor thermometer to check accuracy and unit was right on. So I trust it.  My first placement location outside did not have good airflow and so unit read 5-to-10 degrees warmer.  Resituated outdoor transmitter to another shaded location with better air flow and outside reading is now in line with local weather reports.