Sharkk Basics PH Tester Full Spectrum Multi-Function Portable pH Tester with Calibration Button and Back Light LCD Display FULL SPECTRUM MEASURING RANGE - With a measuring range of 0-14, the pH Tester is guaranteed to display accurate results after each and every use. THE pH TESTER DOES NOT INCLUDE THE BUFFER SOLUTION. CALIBRATION BUTTON  Get rid of test strips with the Sharkk Basics pH tester. Simply place the pH tester in any liquid to be tested and wait for the reading to display. The calibration button resets the tester in between reads. BACKLIT LCD DISPLAY - The LCD screen displays a clear digital reading and comes with backlight that makes using the tester in the dark just as easy. MULTI FUNCTIONAL - You can use the pH Tester around the house and test the acidity/alkaline levels of your swimming pool, drinking water and even your food. PORTABLE DESIGN - The light, compact design makes the pH tester extremely portable.