They work! Easy to operate. Large display shows high and low history

Works as advertised. No problem communicating over two floors.

I got this for my chest freezer, to monitor if it get unplugged or if the temp drops during power outages (we get many bad storms where I’m from) I use my freezer for breastmilk storage, so this alarm helps me to ensure safe storage for my baby

Easy setup and works as advertised. Alarm is load enough to get attention but not annoying.

This AcuRite Thermometer is a fantastic addition to our new garage freezer. Having the ability to track temperature variance and an alarm that sounds in the house for temperature fluctuation is a must.