accurate ph tester-- pH Meter with a sensitive electrode sensor, pH tester with 0-14.0 measuring range could read accurate pH levels quickly and easily. Accurate pH tester Kit (0.01 Resolution) is accurate that it could test accurately within ± 0.01 pH. simple calibration-- pH meter comes with 3pcs pH calibration powder, the calibration button (CAL) and hold the water pH tester at the pH buffer powder for several seconds, pH tester can automatically calibrated. automatic temperature-- When the temperature of the sample solution is different from the standard solution, pH meter has built-in automatic temperature compensation system (ATC) which can accurately determine the pH value of the sample at temperature 0°C-60°C (32°F-140°F). wide application-- Digital pH meters are Perfect for home and laboratory testing. pH pen can test pH and is Perfect for multiple scenarios Perfect for testing water, swimming pools, aquariums, spas, hydroponics, wine and beer. protable design-- design, pH meter for water is easy to carry. 1x pH Meter, 3x calibration packets, 1x user manual. Detailed manual show you how to use pH meter get the best accurate and stable reading. attention - When not in use, please cover the cap. The glass electrode of the ph meter exposed to the air, that make the test error and the value Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! With battery Material: ABS colour: orange Package Contents: 1 x PH meter 3 packs calibration powder 1 x English instruction Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.