what difference is there between this 02027 model and the 02022 model elsewhere for $24? The specs look the same.

I don't see any. The instruction manual is for Model 02027 and Model 02022WB.

is this wall mountable with the adapter plugged in?

It is wall-mountable but is really made to sit on a horizontal surface. Re wall-mountable: when mounted on a wall the mounting hole is 1" away from the wall so you will need nail long enough to go into the wall and stick out more than 1"; the contact surface against the wall is round, not flat, so you have to play with the power wire in order to get the unit to not hang crooked; the power wire is black so is very obvious on the wall -- the wire really should have been made white; b/c the power comes from a wall outlet your options of where to mount this are more limited. Design-wise, wall mounting was obviously an after thought.

Can the remote be placed in a fridge or freezer and is it accurate in that environment? what about using the remote in other rooms in the house?

Haha! I can actually answer this! I'm right now testing it out, by putting the remote unit in the fridge in my camper. It transmitted just fine to the base unit including when I set the fridge to below 32°F. You can definitely put the remote in other rooms.

Brand	AcuRite
Recommended Uses For Product	Forecast, Humidity, Temperature
Special Feature	Humidity Monitor
Number of Batteries	5 AA batteries required.
Style	Modern
Are Batteries Included	No
Item Weight	1.3 Pounds
Manufacturer	Chaney Instruments
Shape	Rectangular
Display Type	digital
Global Trade Identification Number	00072397020275
UPC	079647438767 072397020275
Model	02027A1
Product Dimensions	6.1 x 16.76 x 11.43 cm; 589.67 g
Batteries	5 AA batteries required.
Item model number	02027A1
Special Features	Humidity Monitor
Batteries Included	No
Batteries Required	Yes
Does it contain liquid?	No
Item Weight	590 g

02027 Color Weather Station with Temperature and Humidity Monitor, Weather Forecaster - Dark Theme

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