Feature 1、An ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food, beverage etc. 2、3 in 1 multifunctional water tester, test the temperature, TDS and EC value of any liquids. 3、Large LCD display and lock function, easy to read and record the displayed value. 4、Highly efficient and accurate due to its advanced microprocessor technology. 5、Lightweight and portable design, convenient for indoor and outdoor use. Feature: An ideal instrument for any aquarium, the fishing industry, swimming pools, school laboratories, food, beverage etc. 3 in 1 multifunctional water tester, test the temperature, TDS and EC value of any liquids. Large LCD display and lock function, easy to read and record the displayed value. Highly efficient and accurate due to its advanced microprocessor technology. Lightweight and portable design, convenient for indoor and outdoor use. Speciation: Material: ABS Accuracy: ±2% TDC testing range: 0-9990ppm EC testing range: 0-9990us/cm Temperature testing range: 0°C~80°C Battery: 1pc CR2032 button battery(Not included) Size: 15.4*3*1.4cm / 5.9*1.2*0.6inch (Approx.) How to use: Remove the electrode protecting cover before using. Switch on and put the electrode into the tested liquid. Read and record the displayed value. Switch off, clean and dry the meter and replace the protecting cover. Package list: 1 * Water TDS Meter 1 * User manual