Product review (5 stars): Inside and outside readings displayed, attractive, working well. Recommended.
I like it. Humidity & temps are shown for both inside & outside. Signal from outside seems pretty stable so far. The inside display is larger than I expected, measuring 6" x 4".  But that also means it's easy to see & read. Each unit uses 2 AA batteries, and maybe that means less need to replace batteries compared with AAA. Recommended.