Easy to Use: Simply immerse the pH meter electrode in the solution to be tested, and read the results quickly on a large LCD display. Wide Application: Suitable for aquariums, the fishing industry, swimming pools, spas, school laboratories, and food beverage drinking water, among other uses. Auto Calibrated and Ready to Use: Builtin calibration with 2 buffer powders included. Just press a button to finish the calibration. This pH meter is factory calibrated, so users can use it directly. Fast and Accurate Results: No need to rely on color charts or test strips. Resolution is 0.01 pH, and accuracy is ±0.01 pH. Practical applications Aquarium maintenance: Monitor and adjust pH to maintain a healthy environment for fish and aquatic plants. Pools and spas: Regularly check water pH to ensure safe, comfortable, and compliant bathing conditions. Food beverage and drinking water testing: Verify water quality and consistency in processing, preparation, and consumption contexts. Includes 2 buffer powders for calibration and a userfriendly experience with direct, outofthebox usability.