1. Operating steps: Digital aquarium thermometer. First, press the PWR button on the thermometer. Immerse the probe into the aquarium to measure the water temperature (only for submersible probes; do not submerge the thermometer itself in water). The included suction cup can attach the LCD screen to the side of the aquarium. 2. design: The aquarium water thermometer features suction cups for attaching to glass containers, aquariums, or animal enclosures. The LCD screen is clear, providing accurate temperature readings. There is sufficient space between the immersion probe and the LCD display to ensure visibility without worrying about screen fogging. It also protects electronic components from moisture. 3. Easy to read: The water temperature can be easily read via the LCD display. The temperature unit can be switched between °C and °F with a button press. When 'HC' appears on the screen, the temperature exceeds 70°C, and when 'LC' is displayed, the temperature is below 50°C. 4. Wide applications: The digital aquarium thermometer can be used in freshwater, tap water, saltwater, and marine aquariums. It is suitable for fish tanks, reptile enclosures, incubators, refrigerators, cigar humidors, and more. This digital aquarium thermometer helps protect reptiles, fish, and small animals from dangerous temperatures.