RaiderinKS
Lowland Gorilla
I bought some at Fryes Electronics from LaCrosse Technologies.
It can read up to three additional remote wireless sensors + the one on the base.
It keeps track of the last 9999 readings, which you can download in a CSV and graph. I don't have the model number in front of me, but it is accurate to the 1% in RH.
Model # pls.