Feature: 1. The professional soil meter is used to test the NPK of the soil to help achieve the optimal level of crop growth. 2. High sensitivity probe, accurate measurement, stainless steel probe, the error range is reduced to 2%. 3. The product is small and beautiful, easy to carry, convenient for indoor and outdoor use, suitable for farms, gardens and lawns. 4. Portable measurement, accurately grasp the soil fertility status, in order to improve plant yield. 5. LCD display, direct display of measurement data, without long waiting. It can also display the battery level. Specification: Item Type: Soil Sensor Material: ABS+Stainless Steel Color: As shown in the picture Size: Approx.170.5x37mm/6.71x1.46in Probe Length: Approx.65mm/2.56in Weight: Approx.820g/28.9oz Battery: DC 3.7V lithium battery 4000MAH (Built-in) Measuring Range: 1-1999mg/kg (mg/L) Resolution: 1mg/kg (mg/L) Measurement Accuracy: ±2%F.S. Response Time: <1s Protection Level: IP68 Working Temperature: -20°C-60°C . Package List: 3 x Soil Sensor1 x Storage Box1 x Instruction Manual Note: 1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.