Features: The PH3012LCD online detection instrument is a portable and reliable solution for accurate water quality monitoring, ensuring precise measurements everytimes. Featuring a durability plastic construction, this meter is lightweight and easy to handle, making it ideal for both fieldwork and laboratory use. Perfect for environmental scientists, aquarists, and home brewer who require consistent and accurate readings. Use it in various setting such as aquariums, swimming pools, hydroponics, and water treatments facilities to maintain optimally water conditions. With its user friendly LCD display, the PH3012LCD provide clear and quick readings, enhancing your water testing efficiency and accuracy. Specifications: Component:Plastic Size:Approx.18.5x4cm/7.28x1.57inch Cable Length:Approx.110cm/43.31inch Power supply voltages: 6V Package Includes: 1pcs Water Quality Monitoring Pen note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.