Product review (2 stars): Inaccurate
This device is not very accurate, especially humidity measurements. I had both the indoor and outdoor units next to each other for several days, so indoor/outdoor measurements should be the same: temperature measurements were usually within one degree F, but humidity measurements differed by as much as a factor of three, as time went on they were closer but still had large differences. I didn't have a very accurate standard device to check absolute accuracy of AcuRite 00611A3. The device could be useful in systematic errors can be identified.