Features: High Precision Composite Electrode Sensor: Using a composite electrode sensor to measure quickly and accurately, combined with a zinc alloy blade, it can measure the pH value of soil or bread pastries. Three Point Calibration and Automatic Recognition: The instrument has a three-point calibration function, and the sensor automatically recognizes the buffer solution to complete probe calibration. Alarm Prompt: When the pH value is below 3.5 or above 12.5 pH, the screen turn red, indicating that the liquid is approaching strong acids or bases. Automatic Temperature Compensation Function: The level of temperature have a certain impact on pH measurement, and if high accuracy is required, the impact be even greater. Therefore, the temperature compensation function is necessary. Large LCD Display Screen: With backlight screen, dark and strong light environment can also clearly view the value, easy to deal with a variety of environmental measurement. Much Needed Garden Tool: The meter comes with an A-tapered zinc alloy cutter that helps press a hole in the soil. Suitable for all types of soil and media. This has assisted you in developing and maintaining ground planted vegetable, flowers, lawn, gardening, hydroponics. Specifications: pH Measuring Range: 0.0~14.0pH Basic Error of pH Measurement: 0.1pH Repeatability: 0.1 Resolution: 0.1pH Solution Temperature Compensation Range: 0~70 Temperature Accuracy: 0.1 Temperature Range of Measured Solution: 0~60 Power Supply: 2 * 1.5V AAA batteries (Not included) Display: LCD large screen display Working Ambient Temperature: 0~50 Working Environment Humidity: 85%RH Material: Plastic colour: Package Contents: 1 x pH Meter 6 x pH4.01, pH7.00, pH10.01 Powder (2 packs ofeach type) 2 x Potassium Chloride Powder 1 x Empty Bottle 2 x Pipette 1 x Brush 1 x Protective Cap 1 x Zinc Alloy Cutter 1 x User Manual (English) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.