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 or pH or temperature of solution or 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. 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 Item Type: Water Quality TesterMaterial: PlasticColor: As shown in the picturePH Measurement Range: pH 0.00- 14.00, temperature measurement range: 0℃-50℃ (32°F-122°F)ORP Measuring Range: 0-±1999mVResolution: pH 0.01PH, temperature: 0.1°C ( 0.2°F), ORP: 1mVAccuracy: ± 0.1pH, temperature: ± 1.0°C, ORP: ±5mVTemperature Compensation: 0°C-50°CWorking Temperature: 0°C-50°CWeight: Approx. 571g or 20.1ozHow 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.