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 Tester Material: ABS Battery Parameters: 4 x LR44 Button Batteries (Not Included) Four Functions: PH, ORP, H2 Rich Hydrogen, Temperature Measurement PH Test Range: 0.01-14.00pH Resolution: 0.01pH, Accuracy: ±0.05pH ORP Test Range: ±1200mV Resolution: 1mV Accuracy: ±2mV H2 Test Range: 0-2400ppd; 0.001-2.400 Resolution: 2ppb; 0.002ppm Accuracy: ±10ppb; ±0.01ppm Temperature Test Range: -30-60℃, -22-140℉ Temperature Accuracy: ±1℃ Temperature Resolution: 1℃/℉ Automatic Shutdown: 5 Minutes Display: Backlight Optional, LCD Digital Display Waterproof Grade: IP67 Temperature Compensation: Automatic Temperature Compensation -30-60℃ Weight: Approx. 133g/4.7oz. Package List: 1 x Digital Water Tester3 x Testing Powder1 x English Manual Note: After each use, be sure to clean the electrode.