Product review (5 stars): Very easy to install means for comparing inside and outside temperatures
It is Summer now and I have been using this device since Winter. Every day I look at the inside and outside temperature (and humidity) to determine when to "open up" the house to fresh air. I have had no issues with the accuracy as I have compared often to what other thermometers have shown. The batteries seem to be holding up fine. And it was so easy to install. I am very delighted with it and each day I look at it I feel grateful for the team of engineers and marketing people (and Amazon) who brought this useful, reliable device into my life to allow me to be more efficient and operate more intelligently.