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 sensor design. Wide Application: Suitable for measuring pH levels 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 is +/- 1-3 cm.