Product review (1 stars): AccuWrong
I don't know if 1 or both of these are defective or if they're really just trash ... set the 2 of them next to one another and they remain 2 degrees apart through several prolonged tests at different temperatures.  I expect more accuracy than that from a pair of identical digital thermometers.  If I haven't heard from the seller within a couple of days I'll be returning these and ordering a different brand.  Very disappointing.

(Edit)  After allowing almost a week for these to get their act together, they're going back.  They sit within 18" of each other 2 degrees apart on the temperature and 5% off on the humidity.  Trash would be too kind a word.

<a data-hook="product-link-linked" class="a-link-normal" href="/AcuRite-Indoor-Humidity-Monitor-Pack-of-2/dp/B01E81F3CQ/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">AcuRite Indoor Humidity Monitor (Pack of 2)</a>