Features: - Test the pH level and temperature of solution/water with data hold function. - Pocket size, lightweight and portable with switchable backlight & large LCD display for clear reading. - ATC function (automatic temperature compensation), automatic calibration and IP65 fully waterproof design. - Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, swimming pools and other water systems. - Replaceable pH sensor probe - The electrode probe can be replaced with insert type design for convenient and fast replacement. Specifications: Material: ABS Plastic Resolution: 0.01pH Accuracy: plusmn0.05pH Repeatability: plusmn 0.01 Operating Temperature: 0 ~ 50, le80%RH Automatic Temperature Compensation: 0 ~ 70 Calibration: 2 Points Automatic Calibration Power: 4 * 1.5V LR44 Button Cell Battery (NOT Included) Size: Approx. 175 * 45 * 45mm / 6.9 * 1.8 * 1.8in Testing Range: pH: 0.00~14.00pH, TEMP: 0 ~ 60 Package List: 1 * PH Meter 1 * Storage Bag 1 * User Manual Notes: 1. Manual measuring, please allow 1 ~ 3mm error, thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.