2 Pack Waterproof Digital Fridge Freezer Thermometer Max/Min Recording Function Large LCD Display and Magnetic Back for Kitchen Home Restaurants

These are great but they do have a definite shelf life because when the battery goes, it is not trivial to replace (they give you a tiny screwdriver and so on but still not automatic). But the battery in my first set lasted longer than 2. years. Very helpful and works for F or C

they work good for fridge & freezer

Works well and accurate

Good product

I really like how easy these were to set up. You simply press the power button, then press another button to toggle Celsius or Fahrenheit. There's a hook to hang it from something and a magnet on the back to attach to metal surfaces. Also comes with a mini screwdriver to remove the hook if needed. Seems fairly accurate within a few degrees. The screen is a good size and easily legible. Also really love how it shows the recorded high and low temperature, very handy for monitoring something like a fridge. Only issue is that both screens had some vertical scratches that aren't really visible unless held at an angle under bright light.