[3-in-1 pH Meter]pH meter has a three-in-one function, which can measure PH, TDS and temperature with high precision at the same time. All-round measurement of water quality to healthy water quality. [Automatic Calibration pH Tester]With high sensitive glass probe, you can get a full measurement range of 0-14pH, 0.01 pH resolution. And pH meter uses a 3-point calibration to calibrate the electrode to solutions of pH 4.00, pH 6.86, and pH 9.18. You can calibrate effortlessly to the accuracy of your measurements. [High Accuracy Water Tester]High-accuracy algorithm chip and electrode of our digital water ph tester accurate and fast response. Green Backlit LCD Design guarantees that you can read the measuring results in any condition. One-button lock reading function helps lock reading even if the tds Meter is taken out of the sample [Pocket Size Water pH Tester] You can use this small Pocket Size but powerful pH meter device to measure your aquarium, pool, pond in a garden, bath tub to test the levels of pH value. The digital ph meter can also be used to measure drinking water, System, spa, soap mixtures, food, wine, beer or any other liquids. Colour:As Shown Material:plastic Package Contents: 1 * pH Meter 3 * ph buffer power Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.