Features: 4 in 1 Detecting Function: This water quality tester can measure pH, Total Dissolved Solids (TDS), EC, temperature, and chlorine in water to help you fully understand the water quality of the tested sample. Mobile Phone APP Remote View: After connecting to your mobile phone via Bluetooth, all testing results can be viewed on the compatible app. LCD Display Screen with Backlight: The backlit display screen allows for easy reading of test data in low-light or dark environments. The backlight can be turned on or off using the device settings. IP67 Waterproof: The IP67-rated waterproof design ensures the device can be used reliably in wet conditions and offers durable performance. Adjustable Alarm Settings: You can set high or low limits for pH, EC, TDS, or ORP according to your needs. When test results exceed the set range, the value will be displayed in red as a warning. Specifications: pH: Range: 0.1–14.0 pH Resolution: 0.1 pH Accuracy: ±0.1 pH Chlorine: Range: 0.1–4.0 mg/L Resolution: 0.1 mg/L Total Dissolved Solids (TDS): Range: 0–999 ppm, 1000–9990 ppm Resolution: 1 ppm, 10 ppm Accuracy: ±2% F.S. ORP: Range: -999 to +999 mV Resolution: 1 mV Accuracy: ±15 mV Temperature: Range: 0.1°C to 80°C (32.1°F to 176.0°F) Resolution: 0.1° Accuracy: ±0.5° Material: Plastic Color: Blue Package Contents: 1 x Water Quality Detector Note: The package includes only the items listed above. Other accessories are not included. Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement error allowance is ±1–3 cm.