Product review (2 stars): Pretty good for the price, but not high accuracy.
To evaluate this device, I gathered 4 other digital thermo/hygro units and set them within a foot of each other. Allowing them all to stabilize for a few hours, I compared the readings.

The 4 other devices agreed within 1 degree of each other, and a few % of RH. The AcuRite readings were 1 to 2 degrees higher.  The Acurite console sensors agreed with the AcuRite remote sensors exactly.  But I don't really need a thermometer that reads high and can't be adjusted.

I guess I shouldn't expect much from a $10 device.  I didn't give it 3 stars because it was disappointing, but its not terrible.