1 - 5-in-1 PH Meter for Water - This versatile PH meter is designed to measure not just pH, but also TDS, EC, temperature, and salt levels in water. With just one device, you can easily monitor multiple important parameters in your water. 2 - Auto-Calibration - The auto-calibration feature of this PH meter simplifies the process of calibration, making it quick and hassle-free. Simply immerse the electrode in the provided calibration solutions, and the meter will automatically calibrate itself, and comes with calibration powder (standards: pH 4.00, pH 6.86, pH 9.18). This ensures accurate and consistent readings every time. 3 - Accurate pH Tester - With a high accuracy of 0.01 resolution, this PH meter provides precise pH readings, ensuring that you have accurate information about the acidity or alkalinity levels in your water. It is an essential tool for maintaining the optimal pH balance in hydroponics, aquariums, and fish tanks. 4 - Wide Application - This PH meter is suitable for a wide range of applications. Whether you want to test the pH of your drinking water, wine, or even hydroponic nutrient solutions, this device can handle it all. It is also ideal for testing saltwater pools, ensuring that the salt levels are within the recommended range. 5 - User-Friendly Design - This PH meter is designed with ease of use in mind. The large backlit LCD display provides clear and easy-to-read results, even in low light conditions. The compact and portable design makes it convenient to carry around, allowing you to test water anywhere, anytime. So, whether you are a professional or a hobbyist, this PH meter is a reliable and convenient tool.