Package content: you will receive 2 electronic aquarium thermometers, each thermometer comes with its own battery, enough to meet your daily needs and replacements, and you can share one with your friends > Easy to install: The fish tank thermometer is easy and convenient to use, you just need to tear off the adhesive film on the back and stick the thermometer outside the fish tank below the water level. water, helping you to read the temperature accurately LED digital display: the aquarium thermometer adopts LED digital display, with large green font display, which is clear and easy for you to read fish tank or fish tank temperature Widely applicable: these aquarium thermometers are practical and useful tools, which can be widely used for aquariums, aquariums and more, allowing you to know the temperature avoid fish, reptiles and other small animals in dangerous temperatures