Feature: 1. MULTIFUNCTIONAL APPLICATION: Multifunctional bluetooth PH meter, supports connecting to for TUYA APP applet, suitable for water hydroponics and other environments. 2. 5 IN 1 PH METER: The meter has 5 in 1 function to measure PH, Total Dissolved Solids, EC (conductivity), CF and temperature, comprehensive water quality measurement to ensure consistent results. 3. PH MEASUREMENT RANGE AND RESOLUTION: The digital PH meter utilizes a solid glass probe to obtain a complete measurement range of 0 to 14 pH with 0.01 pH resolution. 4. TOTAL DISSOLVED SOLIDS MEASUREMENT: Professional 5 in 1 PH meter for fast and accurate Total Dissolved Solids testing for hydroponics or wherever Total Dissolved Solids is important. Total Dissolved Solids range of 0 to 19,900 ppm. 5. HIGH ACCURACY SENSOR: The bluetooth PH meter utilizes a high accuracy sensor that is accurate and reliable to ensure accurate test results. Specification: Item Type: Bluetooth PH Meter Material: ABS Weight: Approx. 212g/7.5oz Length: Approx. 22.3cm/8.8in Range: PH: 0.00-14.00pH Total Dissolved Solids: 0-19900ppm, 0-199.0ppt EC: 0-19900us/cm, 0-199.0ms/cm CF: 0-1990.0CF Temperature: 0°C-50°C (32°F-122°F) Resolution: PH: 0.01pH Total Dissolved Solids: 1ppm (<1999ppm), 10ppm (>1999ppm) and 0.1ppt EC: 1us/cm (<1999us/cm), 10us/cm (>1999us/cm) and 0.1ms/cm CF: 1CF Temperature: 0.1°C (0.2°F) Accuracy: PH:±0.05pH, EC, Total Dissolved Solids, CF:±2%F.S, Temperature:±1.0°C Battery: 4 x LR44 Button Battery (Shipped Without Battery) Temperature Compensation: 0°C-50°C Operating Temperature: 0°C-50°C. Package List: 1 x Bluetooth PH Meter (Battery Not Included) 1 x User Manual 1 x Storage Tube Note: Manual measurement please allow some error.