Feature: 1. The PH gear is automatically calibrated by the button, and the error of the ORP measurement data can be easily corrected with a mini screwdriver. 2. Used in water sources, aquariums, hydroponics, laboratories, spas, swimming pools and other water systems. 3. Widely used to measure ORP/pH/temperature of solution/water, easy to use, and provide instant display results. 4. The clear LCD display with backlight can display 3 results at the same time. Long‑term online monitoring is possible. 5. The detector is equipped with temperature compensation, and the temperature can be switched between Fahrenheit and Celsius. Specification: Item Type: Water Quality Tester Material: Plastic Color: As shown in the picture PH Measurement Range: pH 0.00~14.00, temperature measurement range: 0℃~50℃ (32°F~122°F) ORP Measuring Range: 0~±1999mV Resolution: pH 0.01PH, temperature: 0.1°C (0.2°F), ORP: 1mV Accuracy: ±0.1pH, temperature: ±1.0°C, ORP: ±5mV Temperature Compensation: 0°C~50°C Working Temperature: 0°C~50°C Weight: Approx. 571g / 20.1oz How to Use: 1.Insert the three measuring probes into the instrument. 2.Plug in the power connector. 3.Put the monitoring head into the liquid to be monitored. 4.The value can be displayed. . Package List: 1 x Tester1 x PH Probe1 x ORP Probe1 x Temperature Probe2 x Suction Cup1 x Screwdriver1 x Adapter1 x Plastic Bracket1 x Instruction Manual