Features: Quality Material: Made of high-quality ABS material for enhanced durability. Backlight Display: Easy-to-read screen that allows use in low-light conditions. High Precision: Accurate to 0.1pH with a resolution of 0.01pH for reliable measurements. Easy Operation: Simple to use with manual single-point calibration. Replaceable Electrode: Offers high cost performance with replaceable probe design. Wide Application: Suitable for measuring pH in drinking water, hydroponics, aquariums, swimming pools, and laboratories. 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 in color between the image and the actual item. Measurement error tolerance is 13 cm. Only the items listed above are included; other accessories are not included.