Are these battery powered?

The description in add is incorrect it mentions battery-powered. No batteries are needed. This is a maintenance-free thermometer. Nothing to replace ever.

These seem to be a few degrees cooler than all my digital thermometers. Is there a certain way to use them? Does the cold metal make them inaccurate?

After extensive testing in my refrigerator, my 2 thermometers differ by 4 degrees. The cooler one closely matches another thermometer I have so I guess I will just trash the higher one.

What does "ok" freeze mean?

Instead of "O.K. Freeze" which is confusing, some dial thermometer makers just label it as "Freeze", for example, see Taylor Precision Products 5924,3-inch Dial Kitchen Refrigerator and Freezer Kitchen Thermometer.

Brand	PECULA
Special Feature	High Accuracy
Color	Blue,Red
Age Range (Description)	Adult
Included Components	Battery
Outer Material	Stainless Steel
Display Type	Analog
Product Care Instructions	Wipe Clean
Unit Count	2.0 Count
Power Source	Not Battery Powered
Model Name	PECULA Refrigerator Thermometer
Item Length	2.95 Inches
Upper Temperature Rating	30 Degrees Celsius
Response Time	20 seconds
Reusability	Reusable
Style	Classic
Indoor/Outdoor Usage	Indoor
Manufacturer	PECULA
Item Weight	2.82 ounces
ASIN	B089NLQ7SF
Item model number	d8ae7bed-eb1e-4e55-a76c-924439286a8b
Date First Available	June 29, 2020

Refrigerator Thermometer

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