[AUTOMATIC CALIBRATION] The pH meter features automatic temperature compensation that adjusts for water temperature and quality, providing pH readings almost instantly. No need for adjustment tools before usesimply complete calibration using the auto calibration button and the included calibration powders. [EASY & FAST & ACCURATE] This digital pH water quality meter offers high accuracy with a measurement range of 0 to 14 pH and a resolution of 0.01 pH. Simply remove the protective cap, immerse the electrode in the solution, turn on the meter using the ON/OFF switch, and read the result on the display. No color charts or test strips required. Measures and displays pH results simultaneously on the LCD screen for reliable and fast readings. [COMFORTABLE DESIGN] Includes three additional sets of pH calibration powders for easy calibration using the provided pH 4.00, 6.86, and 9.18 standards, offering greater accuracy than test strips. Backlit LCD display ensures clear visibility. Pen-style design is compact, portable, and fits easily in a pocket or bag. [WIDELY APPLICATION] This pocket-sized pH meter is ideal for both field testing and laboratory use. Suitable for measuring pH levels in drinking water, pools, aquariums, spas, hydroponics, food, and wine. A versatile tool for measuring the pH of various liquids. Color: Yellow Material: ABS Package Contents: 1 x pH meter 3 x pH calibration powders 1 x transparent box 2 x 1.5V LR44 batteries 1 x user manual in English The package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.