Features:

• NTC WATERPROOF PROBES - This aquarium thermometer uses high-precision NTC waterproof metal sensor probes to measure the water temperature of the aquarium.
• DUAL SENSOR PROBES - Comes with 2 probes, enabling the thermometer to test the temperatures of two different places. For example, measuring the temp of indoor&outdoor or two different tanks at the same time.
• RED&BLUE DISPLAY - Icstation temp sensor uses a HD LCD display to let you know the Fahrenheit temperature of the fish tank in real time, thus providing a healthy and comfortable water environment for your lovely fishes. The clear red and blue display makes it easy to read temperatures no matter in bright and dark.
• WIDE TEMP RANGE - Temperature Range -58 ℉ ~ +257℉(Fahrenheit); Temperature measurement accuracy: ±1℉ (±0.1℉ when temperature within -9.9~99.9F). It can be not only used in water but also used to measure the air temperature. But the water temperature will be more accurate than that of air.
• 3 FEET WIRES - With 1 meter long wires, it is flexible to place the 2 sensor probes in aquarium tank, fish tank, reptile terrarium, refrigerator, brooders, vehicle or any other place that requires monitoring of temperature.

Details:

Points
Dual temperature display
2 NTC sensors
Wide measuring temperature range
High precision detection
Display in Fahrenheit

Parameters
Work voltage: DC 4V-28V
Temperature Unit: Fahrenheit
Measure range: -58F~257F
LED Display: Red+Blue 3Bit
Length of sensor: 1 meter/3ft
Measurement accuracy: 1F(It is 0.1F when temperature is -9.9~99.9F)
Size: 48*29*22mm

Note
Please pay attention to the direction of the power wire.