My acu-rite with wired probe is accurate with temps but the humidity is whats off on it. Right about 10% too low. I thought this maybe was a fluke so i bought a second one since there only $12 and that reads identical in temps and humidity as the other acu-rite with wired probe. The model must not have a good hygrometer reading. Its fine though. Seeing i have 2 other thermometers that show the right humidity, im not worried about what the Acu-rite is showing. But i have a good guideline for them reading 10% lower than the actual room humidity.