PH Meter with Automatic Calibration, 7Pros High Accuracy Pen Type Water Quality Tester, 6 pH Buffer Powder Packets, Best Tool for Testing PH of Fish Tank, Pool, Pond, Kombucha, Wine and Drinking Water EASY MEASUREMENT AND ACCURATE RESULTS  no more time consuming paper strips or other inaccurate pH test chemicals, our device is a digital pH tester which will allow you to test your liquid quickly and accurately within 0.01 pH - no matter what your liquid is or whether you are a new or experienced user AUTOMATIC CALIBRATION  our 7Pros PH meter comes factory calibrated, but recalibration is required in case of long period of inactivity or after a frequent use. For a proper calibration you get 2 sets of calibration powder (6 packets), no need of any kind of screwdrivers to calibrate, you just have to push the auto-calibration button. Easy Instructions manual is included IDEAL FOR ANY HOUSEHOLD- You can use this small, but powerful, device to measure your aquarium, pool, pond in a garden, bath tub to test the levels of alkalinity in your drinking water, urine, RO System, spa, soap mixtures, food, wine, beer or any other liquids. Do you Travel a lot? Make sure the water you drinking abroad is good enough - take your 7Pros pH meter with you and test the water before drinking. Along with a tds meter it will form a perfect travel kit. FAST RESULTS, CONVENIENT SIZE - it only takes a few seconds for your result to appear on screen. Simply press "ON", stir gently and the reading will stabilize on the display in moments. This portable size instrument allows you to carry it around easily in your pocket and do your measuring anywhere. Its special plastic case will protect it whether you take it to the pool, on a trip, to the beach, camping or a picnic AUTOMATIC TEMPERATURE COMPENSATION - no more need to take care about the temperature of testing liquid, as 7Pros meter has built in (ATC) automatic temperature compensation, so that it can accurately determine pH value of the sample at any temperature in a range of 0C - 80C (32F - 176F)