Product review (4 stars): Indoor sensor n display unit is superb.
I kept all the sensors turned on for 24hrs in one place after which i noticed that the indoor sensors and main display unit read exact(in celcius,im from india we use C) but outdoor sensor had some discrepency(showing more than indoor)..in farenhiet mode all sensors had different readings +/- 3,(for outdoor +7)
Humidity readings where almost same but the outdoor sensor read it less by 3%
My conclustion is outdoor sensor is not as accurate as indoor sensors.
I will update again in few months