Product review (3 stars): Wireless interference issue FYI, outdoor RH sensor fail, reliability issues
I have AcuRite model 00609SBDIA2 which looks exactly the same.  I noticed that when the base receiver is placed close to my PC speakers, wireless phone base, or the flat-panel display,  I get strange readings (like 124 degrees F outside when there is snow on the ground, or -28F when the snow is melting).  Indoor Temp/RH seemed unaffected. Moving the base receiver away from other RF sources seems to have fixed the issue.  Just a note to other buyers. Also: Outdoor RH seemed to vary widely, and I don't believe it to be trustworthy, especially in common subzero conditions here in Michigan.  Ultimately the RH sensor failed and it reads 99% all the time now.  I don't think it was designed to handle deep subzero temperatures with reliability.  It is not the lithium battery which can handle much colder temperatures, and the outdoor monitor was hung in a shaded and sheltered area under my roof eaves.