Features: Brand new and high quality High-accuracy algorithm chip and lab quality glass probe ensure accurate and fast response. Measures 0-14 pH ranges with a high 0.01PH resolution. Suitable for swimming pool, drinking water, aquarium, growing tent, and brewing. The mini size ph meter we designed allows you to easily put it in your pocket, so you can take measurements anywhere. Turn on the switches,put the probe into the water and stir (make the small glass ball fully contact the liquid) and the value can be read when the value is stable. There is no need to care about the temperature of the liquid being measured. The PH meter has an automatic temperature compensation function, which can be adjusted according to the water temperature and water quality. Specifications: Material:Plastic Size:Approx.15.1x2.9x1.5cm/5.94x1.14x0.59inch Measuring ranges: 0.00-14. 00PH Resolving power 0.1PH Accuracy 0.1PH Working voltage: 2x1.5V (LR44 button battery) Work environment:0-60°C Package Includes: 1x PH Meter note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.