Our water quality test pen features an oversized LCD screen, ensuring clear visibility in various lighting conditions. The bright display is perfect for users of all ages, including the elderly and children, making it effortless to read and interpret results accurately. Versatile and compact, this 4-in-1 tester is ideal for testing water quality at home or on the go. From checking drinking water to maintaining aquariums, hydroponic systems, swimming pools, spas, and more, this tool covers a wide range of applications. Ensure your water is safe wherever you are with this convenient device. Trust in accurate and reliable TDS readings with our digital water tester. Equipped with high-quality titanium alloy probes and advanced sensors, it delivers fast results you can depend-on. With a broad range of 0-9999 ppm, this instrument is essential for testing various water sources effectively. Experience comprehensive water testing with our 4-in-1 TDS instrument. Measure total dissolved solids (TDS), electrical conductivity (EC), and temperatures in both Celsius and Fahrenheit effortlessly. The large backlit LCD display, automatic locking function, and quick reading feature enhance user convenience. It's the perfect gift for health-conscious families, new homeowners, gardeners, and outdoor enthusiasts who value clean and healthy water wherever they go. Description: Ensure the safety and quality of your water with our versatile water quality test pen. This 4-in-1 TDS instrument features a large display for easy reading, making it ideal for everyday use. Whether you're testing drinking water at home or on the go, this multi-functional tester is perfect for various settings including RO/DI systems, aquariums, hydroponics, swimming pools, spas, well water, and bottled water. With reliable and accurate results, you can trust the high-quality titanium alloy probes and advanced sensors to measure total dissolved solids (TDS) quickly and efficiently. The wide range of 0-9999 ppm makes it suitable for a variety of applications such as drinking water, swimming pools, hot tubs, aquariums, hydroponic systems, wells, and tap water. This comprehensive water testing tool also measures EC (conductivity) and temperatures in both Degree Celsius and Fahrenheit degree. Easy to use with one-click operation, the tester includes a convenient TDS reference chart for quick understanding of readings. It's the perfect gift for health-conscious families, new homeowners, gardeners, and outdoor enthusiasts who value clean and healthy water wherever they go. Item Name: Digital Water Tester Material: Plastic Battery: 1 x CR2032 Battery(Battery Included) Features: Portable, Easy to Use, Practical Size Details: Length: 15.5cm(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 Digital Water Tester 1 x Storage Cover