Feature: 1. Accurate and Reliable: Water quality tester pen meter not only ensures stable performance but also contributes to exceptional accuracy, making it a trustworthy water quality tester. Utilizes voice prompts for water quality testing, ensuring accurate and reliable results. 2. Multifunctional Design: Water quality tester can measure PH, TDS, EC of water. Fulfill all your testing requirements, fully test water quality. Get healthy pure drinking water or other use water. 3. Easy to Read: PH meter with digital screen helps you see the measurement clearly in any situation. Just dip the probe of the PH tester into the liquid to start the test PH, TDS, EC, and more. 4. Convenient to Carry: It's compact and doesn't need any maintenance. Lightweight and portable design, allowing for water quality testing anytime and anywhere. 5. User Friendly: Simple and easy to understand operating interface, water test meter is suitable for users with varying levels of water quality testing experience. Specification: Item Type: Water Quality Tester Pen Meter Material: ABS Weight: Approx. 171.00g / 6.03oz Battery Type: Built In Lithium Battery (Included) Battery Model: 4 x LR44 Battery Capacity: 400mAh Temperature Range: 0-60℃ Product Size: Approx. 183x43.7mm / 7.2x1.7in. Package List: 1 x Water Quality Tester Pen Meter 3 x pH Calibration Powder 1 x English User Manual