Product review (5 stars): Good product!
This little thermometer is the right tool for the job.  I bought two of these to monitor the interior temp of a well house from outside the house.  There is a heavy insulated roof to the house, so previously all I could do is guess whether freezing conditions existed within the house.  Both thermometers stay within one degree of each other, so calibration looks to be fine.  Very pleased with this purchase.