Amazon.com: yolink Smart Wireless Temperature/Humidity Sensor Wide Range for Freezer Fridge Monitoring Pet Cage/Tank Monitoring, App Alerts, Text/SMS, Email $38.99

Thumb Score: +5

A good deal, I have one in my basement where it gets colder than the rest of my home. I also have one near my turtle tank to make sure I maintain a warm enough tank.

I have a ton of their products at this point.

https://www.amazon.com/dp/B08JP39RLP