Feature:1. [Waterproof] The water quality tester is completely waterproof, the measurement is intuitive and accurate, and it is easy to use. 2. [High Temperature Resistance] The EC conductivity tester uses high-quality graphite probes, conductive, high temperature resistant, moisture-proof and waterproof. 3. [Automatic Switching Machine] The water quality monitor has an automatic switching 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] The water quality tester uses 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 Tester Material: ABS Battery: 1.5V 3 x AA (Battery Not Included) Uses: Can Measure All Types 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). Package List:1 x EC Conductivity Tester 1 x Magnet 1 x User Manual 1 x Plastic Box Note:Battery Not Included