PRACTICAL TOOL: This moisture meter and pH tester is easy to use and features 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). LIGHTWEIGHT AND PORTABLE: This soil tester is lightweight and easy to carry, making it convenient for both indoor and outdoor use. EASY TO USE: No battery required. This soil tester can easily measure soil pH and fertility. IDEAL TOOLKIT: An ideal soil testing kit for flowers, vegetables, gardens, potted plants, lawns, and farms. Soil test result guidelines: Nitrogen: Deficiency (Low): Less than 50 ppm Ideal Range: 50–200 ppm Excess (High): More than 200 ppm Phosphorus: Deficiency (Low): Less than 4 ppm Ideal Range: 4–14 ppm Excess (High): More than 14 ppm Potassium: Deficiency (Low): Less than 50 ppm Ideal Range: 50–200 ppm Excess (High): More than 200 ppm ppm unit: parts per million Package includes: 1 x Moisture Meter and pH Tester Special note: Do not leave the probe inserted in the soil for extended periods. Do not use this device to test liquids to avoid damage. Note: The package does not include any other items. Color is based on the main image; additional images are for illustration only. Due to differences in lighting and monitor displays, the actual color may vary slightly. Manual measurement allows for a 1–3 cm size variation. Thank you. Delivery quantity: as shown in the main image