With its titanium alloy probe, this pen ensures more accurate testing results. Its mini body allows you to carry it with you wherever you go, making it convenient for on-the-go testing. Equipped with a low power consumption smart chip, this pen offers higher precision and more accurate detection. The 3-second speed test feature ensures fast and accurate measurements, while the simple operation makes it easy to start and measure. The one-button lock intelligent memory function is a game-changer. Description: Introducing the water test pen, your ultimate companion for testing water purity anytime, anywhere. With its titanium alloy probe, this pen ensures more accurate testing results. Its mini body allows you to carry it with you wherever you go, making it convenient for on-the-go testing. Equipped with a low power consumption smart chip, this pen offers higher precision and more accurate detection. You can rely on its stable quality for consistent and reliable results. The 3-second speed test feature ensures fast and accurate measurements, while the simple operation makes it easy to start and measure. The one-button lock intelligent memory function is a game-changer. Simply press HOLD to lock the value after it stabilizes, ensuring you don't lose any important data. This pen is perfect for anyone concerned about water quality and wants to ensure the purity of their drinking water. Don't compromise on the quality of your water. Get the water test pen today and have peace of mind knowing that you can test the purity of your water anytime, anywhere. Item Name: Water Test Pen Material: ABS Measuring Range: 0-9990ppm Error: ±2%-3% Resolution: 1ppm Voltage: 3V (Ir44 Button Battery) Features: Low Consumption, Smart Chip, High Accuracy Size Details: L: 13.4cm/5.28", W: 2.5cm/0.98", H: 1.4cm/0.55" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Water Test Pen