3 IN 1 Multifunctional Measuring: This pH meter offers a three-in-one function to measure pH, TDS, and temperature with high precision. Simply remove the protective cover and immerse the electrode in the solution. Backlit LCD Design: The digital pH tester features a backlit LCD screen for easy reading in low-light conditions. It includes a high-quality titanium alloy probe and glass electrode for fast and reliable testing. Insert the probe into the liquid, wait one second, and read the result. High Accuracy: Comes with calibration powders at pH 4.00, pH 6.86, and pH 9.18. Press the automatic calibration button, and the meter will automatically recognize the buffer solution for quick and accurate calibration. A detailed user manual is included to guide you through the process for stable and precise readings. Waterproof and Dustproof: Rated IPX67 for high-level waterproof and dustproof protection. The digital pH tester automatically compensates for temperature variations and provides accurate pH measurements within a temperature range of 0°C to 60°C (32°F to 140°F). The device automatically identifies calibration solutions for fast digital readings. Material: Plastic Color: As shown Package Contents: 1 x Water Quality Monitor Tester 3 x Buffer Powder Note: The package includes only the items listed above. Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement error is +/- 1-3 cm.