Product review (3 stars): Not that impressed
This set of comments refers to both the sensor, shown here, and the associated base station.

I have two of these sensors plus the requisite base station. I am not sure whether it is the base station or the sensor, but contact is often lost between base station and the sensor and I forced to manually force a reconnect, which usually works. The display on the sensor is difficult to read.

I had a Radio Shack base station and remote sensor which worked fine for about 10 years. This does not work well after a few weeks. Not impressed. Note that the base station does not show indoor and outdoor temperatures simultaneously but shows temperature and humidity for which ever sensor is selected (external or the internal sensor). This may or may not be what you require, but I prefer to have a base station that shows the temperature indoors with humidity and outdoors with temperature and humidity at the same time (as did my old Radio Shack base station). This is more a problem with the base station than this sensor.

Overall the system, of which this sensor is a part , is not that good and I would not recommend it to potential purchasers.