Usage Tips: The dissolved oxygen meter provides high-precision and accurate dissolved oxygen readings, enabling quick test results. The Bluetooth-enabled dissolved oxygen meter supports mobile applications for real-time and accurate data transmission. The aquarium water testing kit displays measured values clearly, allowing you to save, manage, and share test data at any time. The digital display dissolved oxygen meter works with a mobile app to control the backlight digital screen, making readings clearer and easier to read. The dissolved oxygen detection kit allows customization of user-defined parameters. The meter automatically turns off after approximately 8 minutes of inactivity and includes a low battery alert function. Measurement range: - Dissolved oxygen: 0.0�C30.0 mg/L - Dissolved oxygen saturation: 0.0�C300.0% - Temperature: 0.1�C40.0��C (32.0�C104.0��F) The dissolved oxygen meter features automatic temperature compensation for more stable and reliable test results. Low dissolved oxygen levels can harm aquatic life. When levels drop to 5.0 mg/L, aquatic organisms may struggle to survive. Prolonged exposure to levels between 1�C2 mg/L can result in significant mortality. Therefore, oxygen monitoring is essential in aquaculture, biological processes, and pond management. This dissolved oxygen detection kit is suitable for measuring and monitoring oxygen levels in various applications, including aquariums, swimming pools, educational experiments, laboratory sterile environments, scientific research, environmental testing (lakes, streams, oceans), wastewater treatment, and wine production. Color: Black Material: Plastic Package Contents: 1 x Oxygen Meter Note: Light reflection and display differences may cause slight variations between the item��s actual color and the image. Measurement error is within +/- 1�C3 cm.