3 IN 1 Multifunctional Measuring: This pH meter offers three-in-one functionality, capable of measuring pH, TDS, and temperature with high precision. Simply remove the protective cover and immerse the electrode into the solution. Backlit LCD Design: The digital pH tester features a backlit LCD screen for easy reading in low-light conditions. Equipped with a high-quality titanium alloy probe and glass electrode, it enables fast and convenient 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 to allow the meter to recognize the buffer solution automatically. The included detailed manual guides you through achieving accurate and stable readings. Waterproof and Dustproof: Designed with IPX67 rating for high-level waterproof and dustproof protection. Temperature can affect pH readings; however, this digital water quality tester accurately measures pH values within a temperature range of 0°C–60°C (32–140°F). The device automatically identifies calibration solutions for quick digital readings. Material: Plastic Color: As shown Package Contents: 1 x Water Quality Monitor Tester 3 x Buffer Powder Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement error allowance is +/- 1-3 cm.