Water quality test pen, with the function of functional test function of PH / test paper and temperature. 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 fast response. Features: Article: Digital PH meter Main material: ABS Main color: Green Battery: 2 * LR44 battery (not included) Size: 155*32mm Gift box packing Note: There may be some deviations due to manual measurement or slight color difference in due to shooting conditions. Thank you for your understanding. Packing List: 1 * Digital PH Meter