Water quality test pen, with the function of PH or test paper and temperature functional test function. Turn off the data storage function, after unplugging the battery, the data will be automatically saved for one month. The color of the LCD screen will change with the pH value, just like the test paper. Backlit display, degrees lighter at night. The acidity and alkalinity of water directly affect human health. High sensitivity probe, high sensitivity and rapid response. Main material: ABS Main color: Green Battery: 2 x LR44 battery (not included) Size: 155x32mm Package size: 17x5.5x3cm Note: There may be some deviations due to manual measurement or slight color difference due to shooting conditions. Thank you for your understanding. Packing list: 1 x Digital PH meter Welcome to meet