The Aqua One Electronic LCD Thermometer is a reliable and efficient solution for monitoring the water temperature of your aquarium. With its large, easy-to-read LCD display, you can easily check the temperature at a glance. This thermometer has an operating range from -10C to 50C, ensuring that it is suitable for most aquatic environments.The Aqua One LCD aquarium thermometer can easily be attached to the outside of the aquarium glass, while the probe extends into the tank to monitor the water temperature..Easy-to-use Aqua One aquarium digital thermometer:New Australian Approved Design. Large, easy-to-read LCD display. Celsius or Fahrenheit temperature selections. Can be used for coldwater, freshwater, or saltwater aquariums