Review on 🐠 auomii Mini Submersible Aquarium Heater with Built-in Thermometer, 50W/100W Small Fish Tank Heater, Intelligent Frequency Conversion, 2 LED Temperature Display, External Temperature Controller by Will Haglund

This little heater could be nice if it could control the temperature in any direction other than up. If you want it to be cooler you have to turn it off for a few minutes until the thermometer forgets its previous programming. Which still makes it a dummy device because imagine having a power outage for more than 10 minutes. Then your fish or reptile will not have the right warmth when the power returns. An article that needs serious improvement