Displays degree Centigrade Fahrenheit: the stick-on digital temperature strip measures both Fahrenheit and Celsius degree, the thermometer strip has a range of 64 Fahrenheit to 93 Fahrenheit and 18 Celsius to 34 Celsius, the large numbers are Fahrenheit and the small numbers are Centigrade Easy to install: aquarium thermometer simply pull the backing off to reveal the adhesive back and apply to the front of your fish tank, aquarium, jar, fermentation bucket; Please remove the transparent protective film on the surface layer, one time use; Great way to keep a quick eye on your fish tank, wine jar's temp Regular size: the fermenter adhesive crystal strip thermometer measures proper size to fit most surfaces, suitable for fermenting, brewing, wine, beer, aquariums, and so on Wide temperature test: fish tank thermometer temperature range -64 Fahrenheit to +93 Fahrenheit, temperature measurement accuracy: ±1 Fahrenheit, after about 2 to 5 minutes, the colored change will indicate the exact temperature; Please keep it from any heat source You will received: there are 36 pieces digital temperature sticker in the package, enough quantity to meet your long time use for different occasions, our digital temperature sticker is suitable for monitor temperature of fish tank and aquarium, also can be applied to measure the temperature of your DIY drinks and wine barrel and any sort of pet tank Colour:Black Material:PET Size:13x1.8cm Package Contents: 36 * Digital Temperature 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.