Feature: 1. Water quality test pen, with the function of PH / test paper functional and temperature test function. 2. High sensitivity probe, high sensitivity and fast response. The color of LCD will change with pH value, just like litmus test paper. 3. Backlight display, clearer degrees at night. The acidity and alkalinity of water directly affect human health. 4. Power off data storage function, after unplugging the battery, the data will be automatically saved for one month. 5. If there are any problems, please contact our store in time. Specification: Features: Water quality test pen, with the function of PH / test paper functional and temperature test function. High sensitivity probe, high sensitivity and fast response. The color of LCD will change with pH value, just like litmus test paper. Backlight display, clearer degrees at night. The acidity and alkalinity of water directly affect human health. Power off data storage function, after unplugging the battery, the data will be automatically saved for one month. If there are any problems, please contact our store in time. Specifications: Item: Digital PH Meter Main Material: ABS Main Color: Green Battery: 2*LR44 Battery(not Included) Size: 155*32mm Package Size: 17*5.5*3cm Package Weight: 112g Gift Box Packaging Note: * There could be some deviations due to manual measurement or slight color difference owing to photographing condition. Thank you for your understanding. Packing List: 1* Digital PH Meter Package List: 1* Digital PH Meter