This Digital PH Meter Water Tester is easy to use, accurate and affordable, making it ideal for home drinking water, laboratory teaching, swimming pools, aquarium pH testing.\r\n \r\nSpecifications:\r\n1. Measuring range: 0.00-14.00 ph\r\n2. Accuracy: 0.01 ph\r\n3. Battery: 2x1.5V LR44 (built-in)\r\n4.Automatic temperature compensation: 0-50 ℃ (32-122 ℉)\r\n5. Size: 18x6x3cm / 7x2.3x1.2inch\r\n6. Gross weight: 100 grams\r\n \r\nFeatures:\r\nHigh Quality and Durable\r\nIt\'s highly accurate for measuring range of 0-14 PH, 0.1 PH accuracy, measure & display pH result simultaneously with LCD diplay, reliable and quick reading.\r\nEasy to Use\r\nYou just remove the protective cap and immerse the PH meter electrode in the solution and turn on the PH by \"ON / OFF\" switch to be measured. Beats the heck out of trying to see the colors of a litmus strip.\r\nEasy to Calibrate\r\nYou can simply follow the instruction on the provided packet of solution 4.01 or 6.86, immerse the PH tester in the solution until numbers get stable.\r\nPocket Size\r\nIt\'s only 1.83 oz with size of 6x1.1x0.5 inch so that you can put it in your pocket wherever you go outside for a PH testing, it also comes with a handy storage case and 3 packets ph buffer powder for calibrating.\r\nWarning Tips\r\nBe careful with the glass probe since it may be a little fragile when you use. Remember to gently wipe it with a clean, soft cloth when you\'re done before capping it again.\r\nPackage Includes:\r\n1 x PH Meter\r\n1 x Carrying case\r\n3 x PH buffer powder\r\n1 x User\'s manual