Features: 1. This test pen is ideal for measuring the pH and temperature of the solution/water. 2. The PH meter has ATC (automatic temperature compensation) function and backlight LCD display. 3. When the PH meter is off, the power consumption is zero, which saves power and energy. 4. It has a wide range of uses and can be used to test the acidity and alkalinity of almost all liquids. 5. The PH meter has good performance, high stability and accurate measurement results. Specification: Item Type: PH Tester Material: Plastic Weight: Approx. 119g / 4.2oz Measuring Range: pH 0.00-14.00, temperature: 0℃-50℃ (32℉-122℉) Measurement Resolution: pH: 0.01ph, temperature: 0.1℃ Measurement Accuracy: PH: ±0.02ph, temperature: ±1.0℃ Working Temperature: 0℃-50℃ (32℉-122℉) Temperature Compensation: 0°C~50°C (32℉-122℉) Battery: 1 x 3V (CR2032) button battery (battery not included) How to Use: Install the battery, turn on the probe and put the probe into the liquid to be tested, and the reading can be displayed. Package List: 1 x PH Tester (Battery Not Included) 1 x Manual Features Accurate pH and Temperature Measurement: This pH tester provides precise readings of both pH and temperature, ensuring you can monitor your solution/water accurately. Automatic Temperature Compensation: The PH meter Features ATC function, which automatically adjusts for temperature changes, ensuring accurate readings in fluctuating environments. Power-Saving Design: With zero power consumption when turned off, this pH meter helps save energy and prolong battery life. Wide Range of Applications: This digital pH meter can be used to test the acidity and alkalinity of a wide variety of liquids, making it versatile for different purposes. High Performance and Stability: This pH meter delivers reliable and stable measurement results, showcasing excellent performance and accuracy.