Description Features: - Wide application: The aquarium thermometer is suitable for aquariums, fish tanks, reptile boxes, incubators, refrigerators, etc. It can protect reptiles, fish and small animals from dangerous temperatures. - Measuring range: The measuring range of fish tank thermometer is -50 ~ +70 degree Celsius / -58~ 158 degree Fahrenheit, the accuracy is +/- 1 degree Celsius. - Package include: 1 x aquarium thermometer, 1 x LR44 battery, 2 x suction cups. - Equipped with two suction cups, one for attaching the cable to the side of the tank and another for attaching the thermometer. - Steps for usage: First press the power button of the reptile thermometer; then put the sensor probe into the water; the attached suction cup can stick the LCD screen to the side of the aquarium. - You can easily read the temperature in the water through the LCD display of the aquarium digital thermometer. The temperature unit can be switched between C and F with the button. Note: Do not put thermometer in water, only the probe sensor is waterproof.