Features: 5 in 1 Water Quality Testing: Integrates pH, TDS, EC, salt and temperature detection in one compact device. Meets the water quality monitoring needs for pools, drinking water, aquariums, and more. One button mode switching for convenient use. Precise for Hydroponic Systems: For hydroponic systems, it accurately measures the pH and EC/TDS values of nutrient solutions, ensuring plants' nutrient absorption and facilitating the healthy growth of indoor gardens. Versatile Home Use: For household use, whether it is testing drinking water or controlling the pH value during the fermentation of homemade drinks and wines, it can quickly obtain reliable data. Pool and Spa Application: In the field of swimming pools and hot tubs, it accurately measures key indicators to maintain water quality balance, protect swimmers' health, extend equipment life, and is also suitable for salt detection in saltwater swimming pools. Ideal for Aquarium: In terms of aquarium detection, it clearly displays the appropriate TDS and salt values for freshwater and seawater, and supports unit conversion. In addition, designs such as automatic temperature compensation, backlight display and quick calibration make the measurement process more efficient and the readings clearer. Specification: Product Name: 5 in 1 Water Tester, Size: 18.3x4.37cm/7.2x1.72inch, Material: Plastic, PH: 0.00-14.00PH, Resolution: 0.01ph, Error: ±0.05ph, TDS: 0-9999ppm/10.0-100.0ppt, Resolution: 1ppm/0.1ppt, Error: ±2%F.S, EC: 0-9999us/cm, Resolution: 1us/cm, Error: ±2%F.S, SALT: 0.01%-10%, Resolution: 0.01%, Error: 0.01%-10%@±5%, Color: Green