Product review (2 stars): Interesting device
Interesting device. Bit of a learning curve on the different settings. But the sensors are a bit troublesome.

While I understand good, top sensors cost a lot. These seem to be hit or miss. The included F007TH has two settings. Temperature and humidity. There is some period of time for allowing them to stabilize in the current environment. After which you have the ability to +- their displayed values on the base unit. Humidity may be a bit harder to get right in an inexpensive sensor but temperature shouldn't be that off. In the three sensors I've had only one was close to the correct temperature. All had humidity off by a lot. I do realize that they come with a year's guarantee, but you still need to RMA it which takes time and shouldn't happen on a new unit. 75 degrees is the same here as in China where they are made. So the QA testing is not very good. The base unit is relatively accurate with temps but a bit off on humidity.

UPDATE: 10/10/2017. So after two years this system continues to be very frustrating. Base unit temp measurements require monthly adjustments. Remote sensors are consistently inconsistent. This week outside sensor indicated it was 112 degrees. But it's only 67. Reset it to the correct temperature and after a couple of hours again it's off and going the wrong way. Responses to manufacturer in the past are to replace the remote sensors. At about $14 each for something that is unreliable seems excessive. And not to get into an argument with Amazon CSR or Ambient Weather I'll just turn it off and toss it. Expensive lesson learned. I'll also lower the stars to 3. Really should be 1 or 2.