I want to use this as a freeze warning for my garage. Would like it to go off if it gets below like 42 degrees. Would this work?

Yes this would work for your needs

Does the Max min setting measure the highest/lowest temp during a set period of time? If so what is that time? 24 hours?

It measures the max/min temperature since you last reset it.

Must I drill a hole in my freezer to use this item?

I routed the cord in back and underneath and ran it up thru the freezer drain hole .

The definition of out probe and in probe are vague. if i'm using this in the freezer is the in probe?= freezer & out probe? room temp?

We have our control display on the outside of the refrigerator. The wired probe sensor is inside the refrigerator compartment and corresponds to the "out" setting. The "in" sensor and setting is within the display so in our case reads the room temp at the outside door. Hope that helps.

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Keep it Cool, Keep it Smart! ❄️

SLEEK SIMPLE - Clean design for easy functionality and visibility.
QUALITY YOU CAN TRUST - Manufactured to the highest standards for reliability.
STAY ALERT STAY FRESH - Built-in alarm alerts you when temperatures drop.
CUSTOMER CENTRIC SUPPORT - Exceptional service ready to assist with any inquiries.
PRECISION AT YOUR FINGERTIPS - Digital display for accurate readings in C or F.

The Digital Refrigerator Thermometer is an essential tool for maintaining optimal fridge and freezer temperatures. With a built-in alarm for temperature drops, a user-friendly digital display, and a focus on quality and customer service, this thermometer ensures your food stays fresh and safe.