Description: The correct water temperature is very important for the health of the fish: drinking beer and wine properly, or using it in the kitchen or at home to monitor the temperature Size 13*1.8cm Temperature range 10-40 degrees The way to observe the water temperature is to see which number of stains change from black to blue, which is the temperature indicated by that number. Specifications: 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 Package Included: 1*Fish tank temperature sticker