Feature:1. [Multi Functional] A water quality test pen with four functions in one, which can measure pH, ORP, H2 hydrogen content and temperature value, which is very practical.2. [Efficient And Accurate] This water quality detector has a high performance, pen shaped design to ensure fast testing, stable values, and accurate calculation results.3. [Applicable Scenarios] The water tester is suitable for the detection of hydrogen content in drinking water, aquaculture, swimming pools and scientific research institutions.4. [Detachable Probe] The probe of the test pen adopts a detachable design, which is easy to store, can prevent accidental damage, and is easy to replace the probe by yourself.5. [Good Performance] Automatic shutdown after 5 minutes, more power saving, LCD digital display, easy to observe, with backlight, IP67 waterproof level, very flexible to use.Specification:Item Type: Digital Water TesterMaterial: ABSBattery Parameters: 4 x LR44 Button Batteries (Not Included)Four Functions: PH, ORP, H2 Rich Hydrogen, Temperature MeasurementPH Test Range: 0.01-14.00pHResolution: 0.01pH, Accuracy: 0.05pHORP Test Range: 1200mVResolution: 1mV Accuracy: 2mVH2 Test Range: 0-2400ppd; 0.001-2.400Resolution: 2ppb; 0.002ppmAccuracy: 10ppb; 0.01ppmTemperature Test Range: -30-60, -22-140Temperature Accuracy: 1Temperature Resolution: 1/Automatic Shutdown: 5 MinutesDisplay: Backlight Optional, LCD Digital DisplayWaterproof Grade: IP67Temperature Compensation: Automatic Temperature Compensation -30-60Weight: Approx. 133g/4.7oz.Package List:1 x Digital Water Tester3 x Testing Powder1 x English ManualNote:After each use, be sure to clean the electrode.