Product review (5 stars): Accurate unit with Large Display
Like a few of the reviewers which complained over the accuracy of this unit, I was initially a little disappointed as the sensor and base unit registered different temperatures and humidity side by side after the batteries were added.

I left it on my desk the rest of the day, and when I came back from doing errands, the temperatures synced up. This unit takes a little while to self calibrated. Now that I know it is functioning properly, I will hang it on a beam in the attic after an attic fan is installed where I can monitor the attic conditions. This will save me a few hundred dollars for an electrician to wire a thermometer from the attic to the bathroom.