1. Submersible Design: The submersible feature of this thermometer enables it to directly measure the water temperature inside the fish tank. It provides real - time and accurate temperature data, as it is in direct contact with the water, ensuring the most precise readings for the aquatic environment. 2. Easy Installation with Suction Cup: Equipped with a suction cup, it can be firmly attached to the inner wall of the fish tank. The installation is hassle - free, and you can adjust its position as needed. The suction cup ensures that the thermometer stays in place during the operation, preventing it from floating around in the tank. 3. Clear LED Digital Display: The LED digital display is bright and easy to read, even in low - light conditions. It clearly shows the water temperature at a glance, allowing you to quickly assess whether the temperature is within the suitable range for your pet fish, facilitating timely adjustments.