General description This 5-in-1 Electronic pH Tester is designed for measuring pH, TDS, EC, salinity, and temperature, making it an essential tool for ensuring water quality in various applications such as drinking water, aquariums, swimming pools, spas, and hydroponics. The device features a backlit LCD display for easy reading of values. Technical specifications pH resolution: 0.01 pH, accuracy: ±0.05 pH TDS meter resolution: 1 ppm (0.1 ppt), accuracy: ±2% Conductivity resolution: 1 µS/cm (0.1 mS/cm), accuracy: ±2% Temperature resolution: 0.1 ℃/℉, accuracy: ±0.5 ℃ Salinity resolution: 0.01%, accuracy: 0.01-5.00% (±0.1%), 5.10-25.00% (±1%) Waterproof rating: IP67 Usage Press the power button to turn on the device. Use the "HOLD" button to lock the displayed value. Press "MODE" to switch between different testing functions. Always wait for the reading to stabilize before taking a measurement. Rinse the probe with distilled water after each measurement to ensure accuracy. Soak the