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. Item Type: EC Conductivity Tester Material: ABS Battery: 1.5V 3 x AA (Battery Not Included) Uses: Can Measure All Kinds of Crops Measuring Range: 0.4-4.4EC 4-44CF 280-3080ppm (EC x 700) 200-2200ppm (EC x 500) Resolution: 0.1EC, 1CF, 70ppm 700, 50ppm 500 Accuracy: 4% Automatic Temperature Compensation: 0~50 Working Temperature: 0~50 (32-122) 1 xEC Conductivity Tester 1 x Magnet 1 x User Manual 1 x Plastic Box Battery Not Included