Product review (1 stars): Ordered 2:  1 worked fine, 1 did not work at all.
Ordered two.  First one I opened and used immediately.  It worked fine.  Second one I was holding for a new chest freezer.  Got the new chest freezer, but well after the return period expired. Opened it, and it didn't work at all.  No LCD readout, no green or red LEDs, nothing. Tried better AAA battery.  Unit is completely dead.  And no return possible.  This sucks.  Not expensive units, but I shouldn't have to buy a another new one.  Amazon:  if you're reading these and you care:  treat me right.