Feature:1. [Waterproof] Water quality tester is completely waterproof design, the measurement is intuitive and accurate, and it is easy to use.2. [High Temperature Resistance] EC conductivity tester uses high quality graphite probes, conductive, high temperature resistance, moisture proof and waterproof.3. [Automatic Switch Machine] Water quality monitor has automatic switch machine, automatic temperature compensation function, long service life, and replaceable sensor.4. [Lightweight and Portable] Lightweight, small size, easy to carry and store, no matter where you go, you can put it in your bag and use it anytime, anywhere.5. [ABS Material] Water quality tester adopts high quality and strong ABS material, which is wear resistant and durable, and can be used for a long time.Specification:Item Type: EC Conductivity TesterMaterial: ABSBattery: 1.5V 3 x AA (Battery Not Included)Uses: Can Measure All Kinds of CropsMeasuring Range:0.4-4.4EC4-44CF280-3080ppm (EC x 700)200-2200ppm (EC x 500)Resolution: 0.1EC, 1CF, 70ppm 700, 50ppm 500Accuracy: 4%Automatic Temperature Compensation: 0~50Working Temperature: 0~50 (32-122).Package List:1 x EC Conductivity Tester1 x Magnet1 x User Manual1 x Plastic BoxNote:Battery Not Included