【Portable Size & Wide Use】: This small tester allows you to carry in pockets and measuring It is great for a wide ranges of drinking water, swimming pools, aquariums, hydroponics, food, beer or any other liquids 【Backlight Display】: tester bright backlit digital display, easy to use no matter in day and night environment, and accurate measurement and clear display results 【Upgrade with High Accuracy】: This meter with Built-in a sensitive electrode sensor, simply pressing "ON" and the result of the will appear on screen in a few seconds. Measurement Ranges: 0.00~14.00pH; Accuracy: +0.01pH 【Easy Measurement & Calibartion】: The meter has an automatic temperature compensation function. It comes with 3 packs of calibration powder. PressingCAL for 5 seconds to enter the calibration modes, press in turn to select the powders corresponding to 6.86, 4, and 9.18 to complete the calibration. When it is long period of inactivity or after a frequent use, you can calibrate the tester with auto-calibration button for a proper calibration 【AUTO Temperature Compensation】: No more need to take cares about the temperature of testing liquid. Our meter has built-in ATCfunction, It can accurately measure the value of the sample at any temperature in the ranges of 0°C-60°C, Manufacturer: XIAOQENAN