Description: Size: 13*1.8cm Temperature range: 10-40 degrees The method of observing the water temperature: see which number the coloring changes from black to blue, which is the temperature indicated by that number Specification: Easy to install: just peel off the transparent protective film on the back and front of the sticker and attach it to the outer wall of the aquarium. Easy to use, easy to read: measure fish tank temperature, DIY beer and wine barrels, glass containers, greenhouses, animal terrariums and any type of pet can, or anywhere in the house, without worrying about batteries and suction cups. Suitable for aquarium and aquarium decoration: it can be used for aquariums for a long time, ideal for aquariums and aquariums. Made of non-toxic materials: safe, non-toxic, environmentally friendly, completely harmless to fish. 100% Satisfaction: Any further question about it, please feel free to contact us. Package List: 1 x Aquarium Fish Tank Liquid Thermometer