Features: Uncover the water quality testing pen, offering balance, conductivity, total dissolved solid (TDS), and temperature measurements in a single device. Easily change between three measurement for comprehensive water quality analysis, ensuring accurate readings in various scenario. For wide of individuals, including homeowners, lab technicians, and wastewater treatments professional. Perfect for applications such as drinking water quality assessment, swimming pool maintenance, and industrial water monitors. Count the IP67 waterproof rating, large display screen, and automatic temperature compensation feature for reliable water quality evaluation. Specifications: Material: ABS Temperature 0.1-50℃, 32-122℉ Waterproof Level: IP67 Auto Off: After 5Minutes Battery: 2xAAA Batteries Required(NOT Included) Size: About. 190x35mm/7.48x1.38in Package Includes: 1x Water Quality Tester Pen note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.