This is an aquarium thermometer with two suction cups, one on the back of the thermometer and the other on the probe cable. You can fix the thermometer on the aquarium. Two temperature units (°C and °F) can be switched. Measuring probe: -50°C~+70°C / -58°F~158°F. Dimensions: 58×37×16mm. Power supply: LR44 battery (included). ON/OFF power button available. This aquarium temperature thermometer is ideal for tropical marine aquariums, aquariums, reptiles, incubators, cars, refrigerators, brooders, cigars, etc. < p>This reptile thermometer with probe is ideal for monitoring the living environment of reptiles, such as lizards, turtles, snakes, etc. Digital LCD display thermometer with probe. Probe cable length: 98cm. NOTE: Do not put the thermometer in water, only the probe is waterproof.