Features: 1 to use, insert the probe into the examined water to grasp the water quality, making it handy to apply at domestic 2 function, manually locking measurement values for straightforward reading and recording 3 and correct readings The extensive LCD show makes it easy to read four pen genre makes it easy to put in a pocket or bag The purity of water could be tested at any time 5 of ABS plastic, sturdy and light Waterproof design, decrease strength consumption Parameters: Accuracy: ± 2% -3% Range: 1~9990ppm Voltage: 3V Battery model: 2X LR44 Accuracy: 1ppm Weight: 34g Size: 25 * 14 * 137mm Testing items Water purity Temperature category TDS value/Celsius/Fahrenheit Number of batteries: 2 Battery specification: LR44 button battery(Not included) TDS range: 0-9999PPM Temperature range: 0-80 degrees Scope of application: tap water/household Water filter/commercial Water filter/industrial water treatment industry, etc Package include: Detection pen X1