Feature 1、Waterproof Design: The battery cover of digital water tester has a gasket design, which is waterproof and enhances the safety of use. Made of premium ABS material, wearable and long service life. 2、Multi Function: Digital water tester pen has automatic temperature compensation, accurate measurement, large LCD screen design, easy function switching, support for automatic shutdown, simple control. 3、High Sensitivity Probe: This digital water quality tester adopts high sensitivity electrode probe, high accuracy water quality measurement can be automatically warmed up to reduce errors. 4、HD LCD Display: Water quality testing pen adopts large LCD screen display, the value is clear, can be easily read. The backlight display ensures that it can be seen clearly even in a dim environment. 5、5 In 1: This water quality meter is designed with 5 measurement functions of PH, CL, Hydrogen, ORP, Temperature, one key switch, easy to operate, convenient to use, meet different testing needs. Item Type: Digital Water Tester Pen Material: ABS Size: Approx. 186mm / 7.3in Test Range: pH, CL, Hydrogen, ORP, Temperature Applicable Industries: Swimming Pool, Hot Spring SPA, Water Plant Laboratory, Aquaculture, Food Processing Plant, Others Battery: Button Battery LR44 x 3 (Batteries Not Included) Waterproof Level: IP65 Operating Environment: 0-60°C (32.0-140.0°F) RH: 100 Percent Backlight: LCD Backlit Display Auto Off: 5 Minutes Display Mode: LCD Digital Display Calibration Method: Auto Calibration pH: Measurement Range: 0-14.00pH Resolution: 0.01pH Accuracy: ±0.01pH Temperature Compensation: (0-60)°C (Automatic) ORP: Measurement Range: ±1999mV Resolution: 1mV Accuracy: ±2mV H₂ (Hydrogen Rich): Measurement Range: 0-10000ppb (0.001-10.000ppb) Resolution: 2ppb (0.002ppb) Accuracy: ±10ppb, (±0.01ppb) Temperature Compensation: (0-60)°C (Automatic) CL₂: Measurement Range: 0.01-4.00ppm Resolution: 0.01ppm Accuracy: ±10% Reading Value, ±0.01ppm Temperature Compensation: (0-60)°C (Automatic) TEMP (Temperature): Measurement Range: 0-60°C Resolution: 0.1°C Accuracy: ±0.1°C Gross Weight: Approx. 135g / 4.8oz Package List 1 x Digital Water Tester Pen1 x User Manual 1 x ORP Test Kit 3 x PH Test Kit Note 1. Maintenance: After the test is completed, shake off the water, keep the motor clean. If not in use for a long time, please remove the battery and cover the electrode protective sleeve.2. Manual measurement, please allow some errors.