Dual Range: Measures from 0 to 999 ppm with a resolution of 1 ppm. Measures from 1000 to 9990 ppm, the resolution is in 10 ppm increments, displayed by a flashing "x10" image. Hold Function: Records measurements for easy reading and recording. Press the TEMP button to switch the temperature display between Fahrenheit and Celsius. Portable Tester with LCD Display: 5 seconds to know the water quality - Both testers with LCD display are suitable for indoor and outdoor use. Fast and Accurate: The gauge can make a quick measurement with the push of a button. Without the use of messy color cards or test strips, the meter can get fast and accurate results. Multiple Applications: Testers are used to test the quality of liquids such as drinking water, aquariums, swimming pools, spas, fountain water, etc. indoor or on vacation, which can ensure the safety of water in daily life.Mesee Water Quality Tester with High Accuracy - Water pH Tester for Drinking Water, Swimming Pool, Aquarium, Pool and Laboratory.Specifications:Product Dimensions: 14.2 x 2.3 x 1.3 cm.Weight: 60 g.TDS Measuring Range: 0 ~ 9999 ppm.Conductivity: 0 ~ 9999 us / cm.Accuracy 2%.TDS 0 ~ 9999 ppm.luckymeet