XINhui 4-in-1 hydrogen rich water tester, pH/ORP/H2 concentration/thermometer with backlight, waterproof portable hydrogen water generator and household test pen Thermometer  (black)

4-IN-1 MULTIFUNCTIONAL TESTER: Professional water quality testing pen measures PH value (acidity-alkalinity), ORP (oxidation-reduction potential in mV), hydrogen concentration (in ppb and ppm), and temperature simultaneously on a clear backlit display DESIGNED FOR HYDROGEN WATER: Specifically engineered to test hydrogen-rich water from generators and home use, providing accurate readings to verify the effectiveness of your hydrogen water system WATERPROOF AND PORTABLE: Compact pen-style design with waterproof construction allows for convenient testing anywhere, featuring easy-to-use MODE/CAL and HOLD/TEMP buttons for quick switching between measurement modes CLEAR DIGITAL DISPLAY: Large backlit LCD screen shows measurement values and temperature readings clearly, with battery indicator to monitor power status during testing COMPLETE TESTING KIT: Includes calibration powder and batteries for immediate use, ensuring accurate measurements right out of the box for reliable water quality monitoring