Product review (1 stars): Too inaccurate to bother with
I've been playing with this now for two days testing it. Its inside and outside temperature gauges are both unacceptably inaccurate. Although I could have given it another star for features, layout, etc. (the screen works well and if this thing was accurate it would be great), I see no point; *a thermometer that is inaccurate is wholly not worth having*. If its readings cannot be relied upon there is no point in having it. You don't design in cupholders for a car that never starts or put granite countertops in a house that is caving in. The features on this mean nothing if its basic mandates cannot be met. I'm frankly surprised that in 2010 a digital thermometer could be so wickedly off. People have put a radio control car on a rocket and driven it around Mars and here we are with a thermometer about as accurate as me putting my hand outside and just going by feel?

With my inside temp ranging between 61 and 68 this once in a blue moon reads the same indoor temp but almost all of the time is predictably 2-4 F higher. Indoor humidity it may read a little low but I can't say that for sure. Its outdoor readings are a bit horrific, also in the +2-5 range, though this morning with it 35F outside according to weather station (and my car tells me the weather station is indeed accurate for this location), in the dark and no sunlight or anything else this was reading 41F. It's total nonsense.

As one reviewer found, I had the humidity-sticking problem. Yesterday it was stuck at 98% outside (weather.com was telling me 91). Not long after despite no change in conditions this went right down to 35 and stayed there for a long time. At some point while at work it worked its way up again. So its outdoor humidity reading is a complete waste of time.

A side note, I bought several of the $7 wired units at the same time and found that their outdoor readings were more accurate than this one's.