Hi you are looking at a brand new complete with batteries pond/aquarium thermometer,these are much better than a traditional thermometer and very accurate and easy to read, not weatherproof .
Features:
LCD screen, easy reading
High quality suction base, easy to install
With long sensor cable
Compact design for discrete use
Submerge probe into fish tank/pond,
Temperature Range: -50°C ~ +70°C
Usage Temperature: -10°C ~ +50°C
LCD Size: 25mm X 12mm
Power: DC 1.5V LR44 button battery (included)
Switch of °C / °F
Accuracy: ±1°C
Cable Length: 1m