PRACTICAL TOOL: This moisture meter and pH tester are easy to use, simple to use and of stable quality. ACCURACY: This soil tester has an accuracy of approximately ± 0.25 pH (20 ° C) ± 0.2 pH (suitable for agricultural or educational experiments). EASY TO CARRY: this Soil Analysis Tool is lightweight and easy to carry, making it easy to use indoors and outdoors. EASY TO USE: A battery is not required. This soil tester can easily test soil pH and fertility. IDEAL TOOL KIT: It is an ideal soil testing tool kit for flowers, vegetables, gardens, potted plants, lawns and farms. The criteria for judging the results of the analysis are as follows: Lack of (TOO LITTLE) Nitrogen less than 50 ppm Phosphorus less than 4 ppm Potassium less than 50 ppm Ideal range (IDEAL) 50-200 ppm 4-14 ppm 50-200 ppm Excess (too much) More than 200 ppm More than 14 ppm More than 200 ppm Unit ppm: parts per million Package included: 1 x Moisture meter and pH level tester Special note: Please do not insert the probe into the soil for a long time and do not use this device to test the liquid to avoid damage. Note: This does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences in different rents monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!