Operating steps - Press the PWR button on the aquarium thermometer to power on. - Immerse the probe into the aquarium to measure the water temperature. Note: only the diving probe should be immersed; do not immerse the thermometer body in water. - Use the attached suction cup to attach the LCD screen to the side of the aquarium. Premium design - The suction cups attach to glass surfaces, aquariums, or animal breeding boxes. - The LCD screen is clear and the temperature readings are accurate. - There is enough space between the immersion probe and the LCD screen to display the temperature. - The LCD screen is protected from moisture, helping safeguard electronic components. Easy to read - The LCD display provides a clear view of the water temperature. - The temperature unit can be switched between °C and °F via a button. - When HC appears on the screen, the temperature is above 70°C; when LC appears, the temperature is below -50°C. Wide applications - Suitable for freshwater, tap water, salt water, seawater, and other aquariums. - Compatible with aquariums, reptile boxes, incubators, refrigerators, and cigar houses. - Helps protect reptiles, fish, and other small animals from dangerous temperatures.