Automatically adjust humidity level by reading outdoor temperatures when install the included outdoor sensor|Control humidity levels manually, simply don't install the outdoor sensor|Easy-to-read and understand LCD readout display|Calibrate the GFX3 in the field to match existing appliances in the home|The GFX3 is of the most accurate in the market RG (77 deg F, 25C) 10% to 90% +/- 3% RH|Mount the GFX3 on in the wall or directly in duct|The GFX3 reads humidity levels accurately no matter the installation, due to extensive venting that more accurately samples the room's air|The GFX3 boasts an extended humidity range from 10% to 75%|That means the GFX3 is ideal for humidors or wine cellars and for older turn-of-the century homes in Northern climates alike|No special wiring is required to install the GFX3|Use any wire may have in truck and the GFX3 will perform as promised|Precision electronics|Extreme accuracy|Long-term stability|Manual or automatic operation|Contemporary appearance|Informative backlit display|User friendly - easy to read|Quick, easy installation|Outdoor temperature compensation mode