Feature 1Efficient and Accurate Measurement: The water ORP meter adopts high performance pen shape design to ensure rapid detection and stable and accurate value. 2HD Large Screen Display: The water quality tester is equipped with a large screen display, the value is clear, easy to read, suitable for all walks of life pH test needs. 3Data Hold Function: When measuring, if it is inconvenient for you to view the measurement results, you can press the Hold key to read the measurement data in the place convenient for observation. 40 to 60 Automatic Temperature Compensation: The temperature compensation eliminates the measurement deviation caused by the solution temperature change. 5Wide Applications: Water quality ORP meter is suitable for drinking water, aquaculture, swimming pool, etc., used to determine various water quality values.Item Type: Digital ORP MeterMaterial: ABSWeight: Approx. 150g/5.3ozLength: Approx. 18.5cm/7.3inRange: minus1200 to 1200MVMeasurement Accuracy: 1mvResolution: +-2mvTemperature Compensation: Automatic warming (ATC)Calibration: 7 seconds built in automatic calibrationAccuracy: TEMP+-0.5Resolution: TEMP: 0.1Power Supply: 3 x 1.5V (LR44) (delivered without battery)Standby: Automatic shutdown after 10 minutesLock: Manually press the button to lock .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 xDigital ORP Meter1 x Specification1 xTestPowderNoteHighly precise sensitive electrode, please keep the electrode clean, after use, please use distilled water or purified water to clean the electrode, please try not to collision or friction electrode in the process of use to avoid damage.