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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Digital Freezer / Fridge Thermometer With Alarm and Max Min Temperature Feature

Digital Freezer / Fridge Thermometer With Alarm and Max Min Temperature Feature

Product ID: 298083227

Details

Age Range (Description)
Adult
Brand
Brannan
Outer Material
Plastic
Special Feature
Alarm
Specification Met
CE

⏰Instant alarm alerts

📊Max/Min temp tracking

📱Bluetooth connectivity

Description

❄️ Keep it cool, keep it smart — never miss a beat with Brannan’s digital freezer thermometer!

STAY AHEAD OF SPOILAGE - Real-time alarm ensures your freezer/fridge never crosses unsafe temps.
PRECISION YOU CAN TRUST - Accurate digital readings with 500ms response time for instant updates.
COMPACT DURABLE DESIGN - Lightweight, freezer-safe plastic housing built for everyday kitchen hustle.
TRACK TEMPERATURE TRENDS - Max and Min temperature memory helps you monitor fluctuations effortlessly.
SEAMLESS SMART INTEGRATION - Bluetooth connectivity lets you check temps remotely—because convenience is key.

The Brannan Digital Freezer/Fridge Thermometer features a fast 500ms response time, Bluetooth connectivity for remote monitoring, and an alarm system to alert you when temperatures stray from safe ranges. Its max/min temperature memory function provides valuable insights into temperature trends, all housed in a compact, freezer-safe plastic design powered by a single AAA battery.

Specifications

ASIN	B0084ZEE4Q
Age Range Description	Adult
Best Sellers Rank	#190,359 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #20 in Refrigerator Thermometers
Brand Name	Brannan
Connectivity Technology	Bluetooth
Customer Reviews	4.1 4.1 out of 5 stars (732)
Display Type	Digital
Indoor Outdoor Usage	Indoor
Item Weight	9 g
Manufacturer	Brannan
Model Name	22/420/3
Model Number	22/420/3
Number of Batteries	1 AAA batteries required.
Outer Material Type	Plastic
Part Number	22/420/3
Power Source Type	बटरी सचालित
Product Care Instructions	Freezer Safe, Wipe Clean
Response Time	500 Milliseconds
Reusability	Rechargeable
Special Features	Alarm
Specification Met	CE
Style Name	Digital
Unit Count	1.0 Count

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