1. Bluetooth Function: Water quality tester compatible with the Tuya app for iOS and Android smartphones, enabling real-time data transmission within a 10-meter range. 2. 6-in-1 Design: Measures pH, EC, TDS, SALINITY, SPECIFIC GRAVITY, and TEMPERATURE. Suitable for domestic water, aquariums, aquaculture, food service, fisheries, and swimming pools. 3. Automatic Control: Automatically disconnects Bluetooth and powers off after 8 minutes of inactivity. Bluetooth reconnects automatically upon activation for convenient testing. 4. Multi-Language Support: Interface languages include English, French, German, Russian, Japanese, Korean, Spanish, and Chinese (Simplified and Traditional). 5. Calibration & Data Export: pH calibration supports standard buffers at 4.00, 6.86, 7.00, 9.18, and 10.00. Supports data export via email for hourly, daily, weekly, and monthly intervals. Item Type: Water Quality Tester Weight: Approx. 192 g (6.8 oz) Battery: 4 x AG13 button batteries (batteries not included) Measurement Ranges: - pH: 0.00–14.00 - EC: 0–19,900 µS/cm; 0–199.0 mS/cm - TDS: 0–19,900 ppm; 0–199.0 ppt - Salinity: 0–199.0 ppt; 0–20% - Specific Gravity: 0.990–1.400 - Temperature: 0°C–50°C (32°F–122°F) - Temperature Compensation Range: 0°C–50°C Compatibility: Works with the Tuya app on iOS and Android devices. How to Use: 1. Remove the protective cover and turn on the device. 2. Rinse the electrode with distilled water and gently dry with filter paper. 3. Immerse the electrode fully into the sample solution. 4. Stir gently and wait for the reading to stabilize. 5. Press the “Mode” button briefly to switch between measurement parameters.