Feature: 1.6-in-1 Meter Bluetooth-compatibility: Driven by mobile applications, it can professionally measure pH, ORP, chlorine, EC, TDS, and temperature. It is applicable to domestic drinking water, hydroponics, laboratories, and aquariums. 2. Cloud Data Management System: Accurate real-time Bluetooth data transmission with clear measurement values. Allows you to save, manage, and share test data at your fingertips without worrying about data loss. 3. Automatic Calibration of pH Tester: High sensitivity glass probe is used. Compared with other pH meters, this device uses a five-point calibration method for pH, providing enhanced accuracy. Calibration solutions included (pH 4.00, pH 6.86, pH 9.18, pH 7.00, pH 0.01). Easy calibration ensures measurement accuracy. 4. Comprehensive Information Display: Simply immerse the pH meter electrode in the solution to be measured, and readings are quickly displayed on the app. Multiple parameters are shown simultaneously, with mobile app-controlled backlight display. 5. High Precision Water Quality Tester: The high-precision algorithm chip and electrode ensure accurate and fast response. The green backlight LCD design ensures readability under any lighting conditions. Specification: pH range: 0.1–14.0 Resolution: 0.1 pH Accuracy: ±0.1 pH Temperature range: 0.1 °C to 80.0 °C (31.2 °F to 176 °F) Resolution: 0.1 °C / 0.1 °F Accuracy: ±0.5 °C EC range: 0–1999 μS/cm, 10.01–20.0 mS/cm, 2000–10000 μS/cm Resolution: 1 μS/cm, 10 μS/cm, 0.01 mS/cm Accuracy: ±2% F.S. TDS range: 0–999 ppm, 1000–9990 ppm Resolution: 1 ppm, 10 ppm Accuracy: ±2% F.S. Chlorine range: 0.1–4.0 mg/L Resolution: 0.1 mg/L ORP range: ±999 mV Resolution: 1 mV Accuracy: ±15 mV Battery: 3 x AAA (not included) Display: LCD digital display Backlight: App-controlled Temperature compensation: Automatic