2-Pcs Aquarium Digital Thermometers include 4-Pcs Batteries for Fish Tank

Description

1、Open the battery and insert battery with(+)positive side up.the LCD will now display the current room temperature. 2、Using the suction cups provided,and attach unit to the outside of the aquarium.Submerge the probe into the water in the aquarium.Do not submerge the display unit.Only the probe is water resistant.3、To preserve battery life,press the PWR button for three second to power off or remove the battery.To power on,press once the PWR button