Ideal for residential or commercial use, water, pool, spas, liquid food, laboratory, aquaculture and hydroponics. | Advanced technology makes the test result fast and accurate.Easy calibration (pH4.00, pH6.86). | Pocket size, lightweight, high quality. | With Automatic Temperature Compensation (ATC). Adjust to water temperature and give pH reading almost instantly. | What You Get: VIVOSUN pH meter, user manual, 2 x 1.5V button cells (built in), 3 x pH buffer powders, 1-year warranty and friendly customer service.