Features: EC/TDS-661 soil meter is used to test the tds value and electrical conductivity of the soil to judge the salt content of the soil. At the same time, it has the function of testing the ambient temperature. Products are widely used in agriculture, forestry, Horticultural Planting, Tree Planting, Greenhouse planting, Agricultural planting, water treatment industries, etc. Specification: Specifications : 1. Range: EC:0-10000us/cm (0-10ms/cm) TDS : 0-10000ppm Temp : -50C-70C (-58F-158F) 2. Resolution EC: 10us/cm (0.01ms/cm) TDS: 10ppm Temp: 0.1C (0.2F) 3. Accuracy EC / TDS : 2 % F.S Temp: 1C (2F) 4. Battery: 4x1.5V (AG13) (not included) 5. Temperature Compensation: 0& 8451;-50& 8451; 6. Dimensions: 285mm x 35mm x 35mm 7. Weight: 100g Operating Information& 65306; 1.Remove the protective cap. 2.Turn the meter on by pressing the ON key. 3.Place the probe to the desired depth and saturate the soil if needed with deionized water. Or immerse the electrode in the solution to be tested. 4.Waiting for the reading to stabilize. 5.Press the "C/F" button to switch between Celsius and Fahrenheit. 6.After use, turn the meter off by pressing the OFF key. Rinse the electrode with distilled water to minimize contamination. Packing List & 65306; 1*Waterproof Soil EC and Temperature Tester 1*Small screwdriver 1*manual in english