DescriptionAre you looking for reliable and convenient water quality tester? Do you want to ensure that your drinking water is safer? Our products will be your good choice. It is made of exquisite craftsmanship and plastic material, has excellent durability and practicality, can help you quickly detect water quality, and provide more possibilities for ensuring your drinking water health. It will be your great tool choice.Features- Color: Mainly white, green.- Material: ABS, electronic component.- Size: 15.20X3.20X1.60cm/ 5.97X1.26X0.63 inch. - Calibration method: 3-point automatic calibration. - Battery: 2X 1.5V (LR44 button battery) - PH Range: -2.00-16.00 PH. - Temperature range: 0-80C/32.0-176F. - Reset function: Press and hold the power button for 3 seconds in the power-on state, then release your hand, when the screen appears: "----" reset successfully. - Automatic temperature compensation function: 0-80C. - Power-off data storage function: After the battery is pulled out, the data will be automatically saved, and the storage time will be one month. - Test paper function: The color of the backlight will change with the PH value, just like litmus paper. - It is made of plastic material, strong and durable, and can serve you for a long time. - The water quality tester pen is a very practical tool. Clean drinking water helps protects the health of children, the elderly, and pregnant women. - The water quality test pen is more compact and convenient for you to carry and use. - The wonderful workmanship, also for temperature testing, multipurpose and practical for you. - With high-definition digital screen display, reading data is more clear and convenient.