Item Type: Water Quality Tester Material: Plastic Weight: Approx. 161g / 5.7oz Product Measurement Range: PH: 0.00~14.00PH ORP: 0~1999MV Temperature: -50-70 (-58-158) Resolution: PH: 0.01PH ORP: 1MV Temperature: 0.1 (0.2) Accuracy PH: 0.1PH ORP: 5MV Temperature: 0.1 (0.2) Power Supply: 4 x 1.5V Button Battery (Battery Not Included) Temperature Compensation: 0C~50C Working Temperature: 0C~50C Applicable 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.1It is widely used to measure the pH/temperature/ORP (oxidation?reduction potential) of water. Just use a mini screwdriver and ATC (Automatic Temperature Compensation) function to easily perform pH/ORP calibration. 2The water quality test pen is a pocket?sized design, light and portable, and has a large LCD screen for easy and clear reading. 3IP65 waterproof and replaceable sensor probb. The electrode probe can be replaced with a replaceable design for quick and easy replacement. 4The temperature test unit is / (switchable unit), an easy?to?operate digital water quality tester. 5Suitable for water sources, soilless culture, aquariums, hydroponics, laboratories, hot springs, environmental water, swimming pools, water purification systems, etc. 1 x Water Quality Tester(Battery Not Included) 1 x Manual 1 x Screwdriver 1 x Protective Shell