Descriptions:If you are looking for a super accurate and reliable meter, this is the one for you This PH meter is a professional and very reliable handheld meter that is used for testing the PH level in a liquid solution. The pH value tells you when you need to add chlorine to your pool or when your wine or cheese is ready. Compared with other traditional PH meters, the most important features is it has automatic temperature calibration to ensure precise results. Features: Large and clear LCD, easy to read and accurately measuring functions. 2-in-1 design, can measure pH and temperature at the same time with high precision. Advanced 2-point auto temperature calibration, no worry about the effect of temperature change on pH, PH value will automatically adjust the temperature between 0~80. Waterproof sensor probe, users can easily change by their own. Energy saving: it will automatically shutdown after 4 minutes without any operation. Apply in water sources, aquarium, hydroponics, spas, swimming pools and other water systems.Specifications:Condition: 100% Brand NewModel: TPH01608Measuring Range:PH: 0.00-14.00phTemperature: 0.1~60Resolution:PH: 0.01phTemperature: 0.1Accuracy:PH: 0.01phTemperature: 0.5Automatic Temperature Compensation: 0-80Operating Temperature: 0~60Power Supply: 3 * 1.5V LR44 button cell(Not Included)Product Size: Approx. 183 * 37 * 37mm / 7.2 * 1.5 * 1.5"Package Weight: Approx. 231g Package Included:1 * PH Meter Operation Steps:1. Remove the protective sleeve2. Clean the electrode with distilled water and wipe clean the spare water.3. Press the "ON/OFF" button. Switch on the meter.4. Immerse the PH meter electrode in the solution for testing.5. Lightly shake the meter, read the data when the numeric stabilized.6. Press the "ON/OFF" button to shut off the instrument. Calibration:1. Full standard buffer solution ph 6.86, in clean beakers.2. Fill 2 beakers, one is used for cleaning the electrode and the other one is used for calibration.3. Turn on the power.4. Put meter into buffering solution. Press "cal" about 5 seconds when screen show until screen show the value is the same with buffer solution.5. Calibration finished.