Feature: 1. It is widely used to measure the PH/temperature/EC/CF/TDS/OPR/RH of solution or water. 2. The clear LCD display with backlight can display 3 results at the same time. Long‑term online monitoring is possible. 3. The detector is equipped with temperature compensation, and the temperature can be switched between Fahrenheit and Celsius. 4. ORP is correctable. Only a mini screwdriver can easily correct data measurement errors. 5. Being used in water sources, aquariums, hydroponics, laboratories, spas, swimming pools and other water systems. It is easy to use and provides instant results. Specification: Item Type: Water Quality Tester Material: Plastic Weight: Approx. 685g / 24.2oz Built-In Battery Model: AA Type: NI-MH Capacity: 3000 (Battery Included) Measuring Range: PH: 0.00-14.00 TEMP:-50 ℃-70 ℃ RH: 10%RH-99%RH EC:0.00-19.99EC CF:0.0-199.9CF TDS: 10-19990ppm ORP:0-±1999MV Measurement Accuracy: PH: ±0.1ph TEMP:±1 ℃ RH: 5%RH EC, CF, TDS: ±2%F.S ORP: 5MV Measurement Resolution: PH: 0.01PH TEMP:0.1 ℃ RH: 1%RH EC: 0.01EC CF: 0.1CF TDS: 10ppm ORP:1MV Working Temperature: 0 ℃-50 ℃ Compensation Temperature: 0 ℃-50 ℃ How to Use: 1.Insert the measuring probe 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 Water Quality Tester3 x Probe2 x Suction Cup1 x Screwdriver1 x Adapter1 x Plastic Rack1 x Manual