100% brand new and high quality Simple to use and convenient to read. Measure the temperature of your fish tank, your DIY Brew Beer and wine barrel, Terrarium, Greenhouse, Vivarium and any sort of pet tank, or any place in your house The right water temperature is very important for the health of your fish, get your beer and wine right or use in kitchen or around the home to monitor temperature Easy to install, just peel off the back of the sticker and the transparent protective film at the front and stick it on the outside wall of the aquarium, that is it. No battery and suction cup to worry about. Dimension: 13 cm/5.12" of length, 1.8 cm/0.71" of width. Measurement range: Celsius degree18-34C, Fahrenheit degree 64-93F. The thermometer changes its color according to the surrounding temperature. If the surrounding temperature is 27C, then the background of scale mark 27C will turn colorful and other scale marks remain black. Material:PET Quantity:1Pc