Hagen Marina Thermo Sensor In/Out Thermometer 11196
Marina ThermoSensor Probe is an aquarium thermometer with an easy-to-read digital display. The thermometer monitors and displays the temperature inside and outside the aquarium in both Celsius and Fahrenheit.
The unit comes with a Velcro mount for easy installation anywhere on the aquarium. Battery included.
Temperature range : -50 C to +70 C (-58 F to +158 F).