Temperature thermometer With Sticking Quality.Stick on the outer surface of fish tank.Simple to use and convenient to read. Measure the temperature of your fish tank, your DIY Brew Beer and wine barrel, Greenhouse 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 to monitor temperature. Easy to install, just peel off transparent protective film at the back and front of the sticker and stick it on the outside wall of the aquarium. No battery and suction cup required.Environmental health. Size is just right for any Aquarium.Wide range of uses Measurement range: Celsius degree10-40 C. Colour: Black Material: PET,liquid crystal Size: 13 x 2cm Package Contents: 12 x thermometer sticker Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.