Professional AccuracyGet the right data, every time. You can count on the digital pH meter to provide you with fast and accurate solution testing. With its highly sensitive electrode and low impedance glass film, it reacts to hydrogen ions in solution for fast and correct results. Automatic Calibration We make your job faster and easier than ever with this handy PH tester With 3-point calibration procedures, your PH tester will automatically identify calibration solutions to give you your reading at a glance. Automatic Temperature Compensation Temperature can affect reading levels, and you need automatic temperature compensation to make sure you get the best reading possible. Unlike other PH meters that only have a 0-50 degree range, ours has an even better 0-70 degree range, so you can test with confidence in any environment. /p> Readable Digital Display with Alert System Tired of squinting at a small screen to get your readings? Take advantage of this pH meter's large, backlit LCD display that displays information in an intuitive layout so you can always see even in low-visibility situations. When the PH value is lower than 3.5 or higher than 12.5, the white digital display will turn red to alert you. Easy to Use You can easily replace the 2 AAA batteries when it's time and you can also activate the 15-minute auto-shutoff feature to save battery life. Plus, it even comes with a storage case to keep it safe and protected when you're on the go. 1 x pH meter with battery, 1x instruction manual, calibration powders pH 3x, 1 x box