Soil EC, also known as soil conductivity, is an indicator of soil water-soluble salts, which is an important attribute of soil and a factor in determining whether salt ions in the soil restrict crop growth. Soil EC is too high or too low will hinder the growth of crops, different plants according to the characteristics of fertilizer and growth stage of different suitable soil EC are different. It is generally between 0.4 and 1 (ms/cm). In the same area, in general, we believe that the higher the EC value, the higher the salinity. Note: Conductivity value, 1ms = 1000 us Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Measurement range: EC 0.00 - 4.00 mS/cm Temperature range: 0 to 50C Resolution: EC 0.01 mS/cm Temperature 0.1C Accuracy: EC 2F-S Temperature 1 Automatic temperature compensation: 0-50 Operating temperature: 0-50 Battery: 2x1.5V(AAA, not included) Colour:Photo Color Material:ABS Package Contents: 1 x Soil EC Tester(Battery is not included in the shipment, the actual product may have slight color difference or difference) 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.