Product review (2 stars): Not very accurate/consistent
With the indoor unit and the outdoor unit next to each other and an AccRite 613A1 Humidity monitor next to those I get readings of 40/44/47% for each of the 3 sensors for RH and temp of 70/71/72.  I wasn't expecting NASA accuracy but that's a pretty big range for RH. The outdoor sensor seems to match my local WeatherUnderground guy pretty closely. For 20 bucks or whatever it was it's not bad but I'll look for something better.