To measure the water temperature, you can use the immersion probe in the aquarium / terrarium submerge / animal breeding. ATTENTION: not a thermometer immersed in water, only put the immersion probe in the water. Aquarium thermometers can switch between Celsius and Fahrenheit display, large digital display can read easy and quick. The aquarium thermometer can read with wide temperature range from -50°C to +70°C, it is available from -10°C to +50°C with working environment temperature. br> The suction cup can adsorb fixed on the surface of the terrarium, aquarium or vivarium. The LCD display is clear and easy to read temperature value can be read within 0.1 degrees. Powered by one LR44 button battery (not included). This item with long probe cable features an LCD display for easy reading, a high quality suction cup for easy installation and a compact design for discreet use. elegant, small and exquisite, suitable for aquarium temperature measurement; Celsius and Fahrenheit temperature