Item Type: Salinity Tester_x000D_ Material: ABS Resin_x000D_ Measuring Temperature: 0-80C (liquid temperature), 10-40C (room temperature)_x000D_ Measurement Accuracy: 0.2%_x000D_ Measuring Range: 0-1.5%_x000D_ Battery: 3 x LR441.5V button battery (battery not included)_x000D_ _x000D_ How to Use:_x000D_ 1. Check whether the salt tester probe is clean. If it is not, please clean it with a neutral detergent._x000D_ 2. Put the test object into a container, and it must have a certain height._x000D_ 3. Press the ON switch of the salt tester and watch the Power indicator light green. If it does not light, it means the battery voltage is too low, and a new battery needs to be replaced._x000D_ 4. Put the probe of the salt tester into the solution at least 2cm and test it at a distance of at least 1cm from the container wall. After the display is stable, read the last reading of the red light that has been lit, and it is the detected value._x000D_ 5. After the test, clean the probe part of the salt tester with a neutral detergent.