It has the function of measuring PH, ORP, hydrogen ion concentration, and water temperature. High sensitivity glass probe, PH measurement range of 0-14pH, 0.01 pH resolution, and pH meter uses a 3-point calibration method, calibrating the electrode to solutions of pH 4.00, pH 6.86, and pH 9.18 to ensure the accuracy of your measurements. Employs a fully transparent liquid crystal to display 4-digit values and the corresponding physical quantity units. Perfect for household and laboratory pH testing applications, including drinking water, swimming pool, pond, etc. Hydrogen-rich water cup USB charging port adopts DC round charging interface, hidden waterproof design, equipped with a charger and charging line, simple, and convenient, can be charged at any time. Specification: Material: Electronic Components+Plastic Meter: Battery: 3x1.5LR44(Built in) Measuring Range: 0-14 Measurement Accuracy: 0.01 Voltage: 4.5V Cup: Rated Power: 0.5w Working Voltage: 5V USB Battery Capacity: 1000mA(Built in) USB Charging Time: 2.5-3 Hours Size Chart: Meter: 183x37mm/7.2x1.5inch Water Cup: 220x70mm/8.7x2.8inch Package Includes: 1 Piece PH Meter 1 Piece Hydrogen-Rich Water Cup 1 Piece User Manual Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.