Digital Aquarium Thermometer Temperature Measuring Tool No Probe No Wire Use Inside of Fish for T Fish Tank Thermo-Meter Digital Heater Water for Top Gallon Aquariums Chiller

Test range: -30 ~ 50 ℃;-20-120℉

just drop it in the for tank and attached the suction cup to the inside of the for tank for easy and accurate reading

It floats and is secured by a included suction cup

Clear and easy to read scale that tells you, unmistakably what the temperature is in BOTH Celsius and degrees

Being that this thermo-meter is inside the for tank, it gives a much accurate reading of the water temperature than those placed on the outside