Digital PH TEMP Tester Meter Pen For Aquarium Pool Wine Water Laboratory Food? Features: Brand New and High Quality Automatic shutdown function: open four minutes after the power shut down automatically, increase the service life of the battery Built with Automatic Temperature Compensation (ATC) Dustproof design: completely prevent dust entering Waterproof design: wash with water without any damage Large screen display, high resolution and accuracy, fast accurate, a classic brand of pocket digital display acidity meter An