Features: Quality Material: Made of high-quality ABS material. Backlight Display: Easy to read and allows use in low-light conditions. High Precision: Accurate to 0.1pH for reliable measurements. Easy Operation: Simple to use with user-friendly design. Replaceable Electrode: Cost-effective replacement feature. Wide Application: Suitable for measuring drinking water, hydroponics, aquariums, swimming pools, laboratories, and more. Specifications: Power Supply: DC 9V (Battery not included) Measurement Range: 0.0014.00 pH Resolution: 0.01 pH Accuracy: 0.1 pH Temperature Compensation: 050C (32122F) Operating Environment: Temperature: 050C (32122F) Relative Humidity: Less than 85% Calibration Mode: Manual single-point calibration Material: Plastic Color: As shown in picture Package Contents: 1 x Digital pH Meter 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 is +/- 13 cm. Only the items listed above are included; other accessories are not included.