1、This product is used to test the TDS value of water and the conductivity of water to judge the purity of water. 2、There is a function to test the water temperature and the temperature of the ring. 3、Automatic shutdown, no operation automatically shut down after 60 seconds of using. 4、Automatic test and lock function: After clearing, insert water to automatically read, display the corresponding ppm and us/cm value according to different water quality, and automatically lock after 5 seconds. 5、Light alarm function, when the test value is lower than or equal to 40PPM, the backlight is green; when the value is higher than 4OPPM, the backlight is red. Features: 1. This product is used to test the TDS value of water and the conductivity of water to judge the purity of water. 2. There is a function to test the water temperature and the temperature of the ring. 3. Automatic shutdown, no operation automatically shut down after 60 seconds of using. 4. Automatic test and lock function: After clearing, insert water to automatically read, display the corresponding ppm and us/cm value according to different water quality, and automatically lock after 5 seconds. 5. Light alarm function, when the test value is lower than or equal to 40PPM, the backlight is green; when the value is higher than 4OPPM, the backlight is red. 6. Widely used in water treatment industry, drinking water industry, family, individual country tourism, field operations, testing tools for testing drinking water quality Specification: Condition: 100% Brand New Testing Range: 0-4999PPM(when the value is more than 4999PPM, there will display ERR) Testing Precision: +/-2% Temperature Testing Range: 0-99℃, precision +/-0.1 Weight: Approx. 66g / 2.3oz Package List: 1 * Digital Water Quality Tester 1 * Bag