To measure the water temperature, you can use the immersion probe in the aquarium/terrarium/submerged breeding. CAUTION: No thermometer immersed in water, only the water immersion probe. Aquarium thermometers can switch between Celsius and Fahrenheit, large digital displays can be read easily and quickly. 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 attached to the surface of the terrarium, aquarium or vivarium can be adsorbed. The LCD display is clear and the easy-to-read temperature value can be read within 0.1 degrees. Powered by one LR44 button battery (not included). This 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 measuring the temperature of the aquarium; Celsius and Fahrenheit temperature conversion. For