This is a Digital LCD Fish Aquarium Tank Marine Water Thermometer.
LCD screen, easy reading
High quality suction base, easy to install
With long sensor cable: 1M
Can switch °C / °F
Power: 1 x LR44 button battery
Measuring range: -50°C to +70°C
Inside the battery has interval slice. You can take it out then open the device. When the screen is not very clear, please replace new batteries.
1 x Aquarium thermometer