Product review (1 stars): Don't buy it
This item doesn't work.  I should have returned it.  The inside thermometer seems to work ok, but I have an a/c thermostat that tells me the inside temperature.  I was looking for a reliable outside thermometer.  I've tried moving it, changing the batteries and yet it gives readings that I know for a fact are way off.  Also, the screen doesn't look dark like what they are showing, it's hard to see.  We had an indoor/outdoor thermometer from Brookstone for many years that worked really well, I should have gotten a new one from them.