Pen Type Low Cost PH Meter for Aquarium Pool Water Wine pH Tester

No Solution and Powder in the package!!!  Pictures only for demonstration

Product description
Easy to Use: Simply immerse the pH meter electrode in the solution to be tested, readings are quickly display on a large lcd display
Wide Application: Ideal instrument for any aquarium, the fishing industry, swimming pools, spa, school laboratories, food & beverage, drinking water etc.
Auto Calibrated: Features in-built calibration with 2 buffer powders.Just press a button to finish the calibration. This pH meter is factory calibrated. Users can use it directly.
Fast and Accurate Results: No need to work with those annoying color charts and test strips.Resolution: 0.01 pH, Accuracy: ±0.01 pH
Compact Portable Design: Pocket fitting pH meter that's also lightweight and compact. Total concealed fit in your bag or pocket for easy, casual carrying. The package includes:

1PC PH Meter Pen (not include powder)