Features: Clear and easy to read scale that tells you, unmistakably what the temperature is in BOTH Celsius and Fahrenheit degrees. It floats and is secured by a included suction cup. Easy to install, just drop it in the for tank and attached the suction cup to the inside of the for tank for easy and accurate reading. Being that this thermo-meter is inside the for tank, it gives a much accurate reading of the water temperature than those placed on the outside Test range: -30 ~ 50 ℃;-20-120℉ Specifications: Test range: -30 ~ 50 ℃;-20-120℉ Length: 14.50x2.80x1cm/5.71"x1.10"x0.39" Suction Cup Diameter: 2.10cm/0.83" Accuracy: ±1℃ Color: Random Delivery (If you buy more than one, colors you receive will be same or different.) Package Includes: 1 x Thermometer note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!