FEATURE: The correct water temperature is very important for the health of your fish. Each color represents a different water temperature. You can see them clearly from the surface. EASY TO USE: The thermometer strip is self-adhesive, just peel off the tape and attach it to the surface of the fish tank, fish tank and other glasses. PACKAGE: Includes 3 adhesive thermometers. Cut: 13cm/5.12" in length. MEASUREMENT RANGE: Degree Celsius in the range of 10-40°C which covers the full range of the fermentation spectrum across various yeast strains. WIDE APPLICATION: Suitable for measuring the temperature of your fish tank, beer and wine barrel, greenhouse and all kinds of pet aquariums etc.