Buy a mercury Thermo for accuracy ...
This thermometer registers temperature based on a metalic coil on the back of the unit. Mine read 4 to 7 degrees to low. The humidity indicator, as others have commented, simply doesn't work.Otherwise, it was an attractive ornament.I just threw it in the trash.If you want to know the temperature, I recommend the dual mercury thermometer for $10, including prime shipping, Reed MM2 Max-Min Analog Thermometer, -40 to 120 Degrees F.You can't see it across the yard, but it's accurate.