Product review (1 stars): Calibrated against multiple thermometers.  Not accurate.
I returned mine.  I conducted multi-point calibration tests against two different thermometers.  Both yielded mean differences in excess of 20 degrees Fahrenheit.  The two thermometers had less than a 1 degree Fahrenheit mean difference.  Regardless of what temperature to which I subjected the probe (high - 92 degrees, low - 42 degrees), it always logged temperatures in a range from 58-74 degrees.  This product is far too inaccurate for my intended use.