Aquarium Thermometer Hygrometer for incubator

Description Temperature Range: -50° C ~ 70° C Usage Temperature: -10° C ~ 50° C Power: 1 X LR44 button battery LCD size: 2.5 X 1.2 cm HOW TO INSTALL? 1. Open the battery cover and insert battery with ( ) positive side up. The LCD will now display the current room temperature. 2. Attach the display unit to the outside of the tank using the suction cups and submerge the probe into the water in the tank. 3. Press and hold the power (pwr) button to turn on. Hold the power button for 3 seconds to turn off.