Feature: The test value of the tester is reliable and the operation is simple and fast. Compact and portable pen design, easy to operate and storage. Large and clear LCD, easy to read and accurately measuring functions. The tester is made of high quality electronic components to ensure high accuracy. The resolution of conductivity tester is 2%F-S, very high sensitivity. Specification: Model: EC-138 Accuracy: 2%F-S Voltage: 1.5V Measure range: 10-1990uS/cm Application: Measuring the conductivity of liquids Product dimension: 150*29*15mm / 5.9*1.1*0.6in Weight: 115g / 4.1oz Package list: 1 * Conductivity Meter(No including battery) 1 * Screwdriver Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product.