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 hinder the growth of , different plants according to the characteristics of 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.