Features: Discover the ultimatewaterquality testing tool with our Digital Tester! With highprecision accuracy, you can trustthis pen for precise measurements every time. Perfect for aquariums, swimming pools, and more. Lightweight and compact, our Digital Tester is designed for easy transportation and use wherever you need it. Its onetouchcalibration ensures accurate readings. Whether you're a homebrewing enthusiasts, a fish tank owner, or a food processing professional, our Digital Tester is perfect for you It's a must have tool for anyone who needs tomonitor waterquality. From aquariums to swimming pools, our Digital Tester is versatile enough to be used in various settings. Ensure the perfect waterbalancefor your fish or maintain a safe swimming environment with ease. Take control of your waterquality testing with our Digital Tester. Its highprecision, easy calibration, andwiderange of applications make it the go to tool for all your watertesting needs. Trust in its accuracy and enjoy peace of mind. Specifications: Material: Plastic TDS Range: 0-9990PPM Battery: 2xLR4(Built-in) Accuracy: 2% Size: Approx. 2.8x1.6x15.2cm/1.1x0.62x5.98in Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x WaterMonitor AnalyzerPen