Feature:

Great for fish tanks, water, freshwater aquarium, refrigerator, reptiles, plant soils.
Comes 2 pack suction cups, easily secured the thermometer to the tank.
Overall made with ABS, high performance, safe and remains durable for use.
Allows you to easily and accurately measure the temperature in the tank.
Places the probe into the water, the temperature displays on a digital readout.
Featuring an easy-to-read digital LCD readout, easily see from multiple angles.
The temperature can be switched between Fahrenheit and Celsius readings.

Specifications:

Type: Fish thermometer
Features: Celsius and Fahrenheit , With Suction Cups
Materials: 90% ABS+ 10% Fiberglass board
Color: Black
Number: 1 Pack
Temperature Range: -50 ℃ ~ +70 ℃
Accuracy: ± 1 ℃
Operating Ambient Temperature: -10 ℃ ~ +50 ℃
Resolution: 0.1 ℃
Power Supply: DC 1.5V
Battery: LR44
Net Weight: 0.026kg/ 0.05 lbs
Product Dimension: L * W * H 5.8x1.2x3.7cm/ 2.29x0.49x1.46 inch

Package Includes: 

1/2/4 x Digital Aquarium Thermometer
2 x Suction Cups