Feature:1. It is widely used to measure the pH/temperature/ORP (oxidationreduction potential) of water. Just use a mini screwdriver and ATC (Automatic Temperature Compensation) function to easily perform pH/ORP calibration.2. The water quality test pen is a pocketsized design, light and portable, and has a large LCD screen for easy and clear reading.3. IP65 waterproof and replaceable sensor probb. The electrode probe can be replaced with a replaceable design for quick and easy replacement.4. The temperature test unit is / (switchable unit), an easytooperate digital water quality tester.5. Suitable for water sources, soilless culture, aquariums, hydroponics, laboratories, hot springs, environmental water, swimming pools, water purification systems, etc.Specification:Item Type: Water Quality TesterMaterial: PlasticWeight: Approx. 161g / 5.7ozProduct Measurement Range:PH: 0.00~14.00PHORP: 0~1999MVTemperature: -50-70 (-58-158)Resolution:PH: 0.01PHORP: 1MVTemperature: 0.1 (0.2)AccuracyPH: 0.1PHORP: 5MVTemperature: 0.1 (0.2)Power Supply: 4 x 1.5V Button Battery (Battery Not Included)Temperature Compensation: 0C~50CWorking Temperature: 0C~50CApplicable Scenarios: suitable for water sources, aquariums, hydroponics, hot springs, swimming pools and other water systems.How to Use:1. Take off the protective cap.2. Wash the electrode with distilled water and blot it dry with filter paper.3. Press the switch power supply.4. Immerse the electrode of the electric meter in the solution until the liquid immersion level. In any case, it is immersed above the level of the display.5. Press the PH / ORP button to select PH or ORP. Wait until the numbers stabilize and Read the final value. After use, turn off the switch, clean the electrode with distilled water, and install the protective case..Package List:1 x Water Quality Tester (Battery Not Included)1 x Manual1 x Screwdriver1 x Protective Shell