The liumy pH meter has an automatic temperature compensation feature that adjusts the water temperature and water quality to give pH readings almost instantly Does not need adjusting screwdriver before use, just complete calibration with auto calibration button and include calibration powders digital pH water The quality meter is very accurate for a measuring range of 0 14 pH, a resolution of 0 01 pH simply simply remove the protective cap, immerse the pH electrode of the pH in the solution, turn on the pH by the switch ON / OFF and Reading display result, no need to operate with color diagrams or test strips Measure and display pH result simultaneously with LCD screen, reliable and fast reading Free 3 sets pH calibration powder, easy to calibrate with pH 4 00 and 6 86 and 9 18 pH Calibration powders makes it more accurate than test strips -clear is easy to read Pocket pen style makes it convenient in your pocket or bag and fits anywhere Pocket Size PHMtre is the perfect test kit for home and lab use Suitable to test the pH balance value of drinking water, spas, aquariums, spas, hydroponics, food and wine a very functional product to accommodate the pH value of all liquids for measure 1 x pH meter with battery, 1x instruction manual (English), 3x pH calibration powders, 1 x transparent box