LED digital aquarium thermometer: this aquarium thermometer has a high resolution LED display for clear reading. Temperature measurement range: 0-99C, accuracy 1C: , update time: 5 seconds.Touch to wake: place the aquarium thermometer on the outside of the glass container below the water level. Touch the fingerprint mark on the screen to read the temperature. The screen goes to sleep after 10 seconds of the display to save energy. Battery Information: 1 x CR2032 button cell (included) Wireless design: aquarium thermometer with precise temperature sensor on the back, no probes and no messy wires in the water to provide a clean and safe environment for fish. Adhesive sticking: the self-adhesive aquarium thermometer comes on the back with a transparent adhesive pad, which is washable and can be attached without leaving any residue. Just peel off the surface film and stick it on the outside of the aquarium, very convenient. Wide application: this aquarium thermometer is suitable for various types of water such as freshwater, tap water, salt water, sea water, etc. It is very suitable for monitoring the life temperature of aquariums, turtle tanks, coral pools, plant pools, glass containers and other PET containers.