Juwel Digital Thermometer 4.0 is a reliable and accurate aquarium thermometer designed to provide precise and easy-to-read water temperature monitoring for freshwater and marine aquariums. Featuring a large, transparent LCD display and a slim, modern design that complements Juwel aquariums perfectly, the Digital Thermometer 4.0 makes it effortless to keep a constant eye on water temperature at all times. The specially developed wired temperature sensor delivers highly accurate readings to within ±0.5°C across a measurement range of 0 to 40°C, ensuring optimal conditions are maintained for fish, plants, and invertebrates. Two included suction cups allow for secure and flexible positioning of the sensor inside the aquarium, while a convenient button on the back allows instant switching between Celsius and Fahrenheit. The improved battery compartment introduced in version 4.0 makes setup and battery replacement even easier. Suitable for both freshwater and saltwater aquariums.