Product review (3 stars): Accurate AcuRite
I bought it to replace another indoor/outdoor digital thermometer that died after 10 years.
It's accurate in reporting temperature from both units, confirmed with another thermometer.  Indoor unit's a lot bigger than I expected - should have noted the dimensions - but it works well.  It also might be a power hog. I've had it about a month and the display looks like battery is already down to about half - but it could be the limitation of the low battery display.  Instruction booklet isn't helpful in describing low battery indicator works, just showing where it is.  We'll see.  My old one took about a year and a half to use up batteries, so watching the battery level more closely.