Multifunction 6-in-1 Water Tester Brand New in Box Ready to Be Operated Upon Arrival Six-in-one Meter: EC, CF, C, F, TDS, pH, Large, Triple Level Display Easy Calibration of pH and TDS with just a Mini-screwdriver Automatic Temperature Compensation (without this, pH reading will differ as the temperature varies) CE Certificated to Offer Safer and Precise Measurement