[pH Meter with Bluetooth] Professional measurement of pH, EC (conductivity), and temperature, suitable for household drinking water, hydroponics, laboratory, and aquarium use. Functions as a standalone tester without requiring a smartphone connection. [Cloud-Based Data Management System] Enables accurate real-time Bluetooth data transmission. Measured values are clearly displayed, allowing easy saving, managing, and sharing of test results without risk of data loss. [Automatic Calibration pH Tester] Features a high-sensitivity glass probe with a full measurement range of 0–14 pH and 0.01 pH resolution. Offers 5-point calibration (compared to standard 3-point), enhancing measurement accuracy. Includes calibration powder with standard buffer solutions: pH 4.00, pH 6.86, pH 9.18 (Asia Standard), and pH 7.00, pH 10.01 (EU Standard) for effortless calibration. [Comprehensive Information Display] Simply immerse the electrode in the test solution to receive fast readings on a large LCD screen. Supports simultaneous multi-parameter display. Backlight settings can be controlled via mobile app. [Easy to Use] Digital pH meter with fully customizable parameters. The app allows setting upper and lower pH limits according to user preferences. If measurements exceed the preset range, the app interface displays the value in red to alert the user. Part Number: BLE-9902 Color: Blue Material: Plastic Package Contents: 1 x Smart Bluetooth pH Meter Note: Light and display differences may cause slight color variations between the product image and actual item. Measurement error allowance is +/- 1–3 cm.