- All-in-one digital water quality tester for measuring pH, RH, EC/CF, TDS (PPM), and Temperature in water. Clear LCD with backlight displays three results at once for quick interpretation. - Temperature can be read in Celsius or Fahrenheit (switchable). Automatic temperature compensation ensures stable readings. Uses an imported IC for reliable, cost-effective performance and precise measurements. - Easy calibration: power off and fully charge before calibrating. For calibration, refer to the instruction manual. pH and TDS calibrations are straightforward with a mini-screwdriver. - Long battery life: after a 3 hour charge, it can run continuously for more than 10 hours, suitable for power outages or outdoor use without power. - Practical applications: ideal for home drinking water testing, monitoring aquarium/pond water or hydroponics, and evaluating outdoor water sources during camping or field work.