Accuracy and reliability: For high precision, equipped with a premium titanium alloy probe, reliable automatic temperature compensation (ATC) ensures accurate readings at all temperatures. It is a must-have hard water testing tool for every home, testing pond water, tap water, filtered water, distilled water, bottled water, well water, frozen water and water hardness tests. Easy Instant: Just turn the TDS meter on and gently stir the water, then the steady reading will automatically lock on the LCD in a few seconds, and if it is not operated for more than 5 minutes, the tds ppm meter will automatically turn off. Multipurpose TDS Tester: Tests the purity of drinking water to ensure its health, monitors if reverse osmosis (RO)/DI systems are working properly, if filters need to be replaced, maintains aquariums, hydroponics (tests nutrition), swimming pools and spas, etc. A full range of 24 hours sales service: professional materials to ensure the quality of the project. Please contact our Enlewlth LLC customer service or send an email to our company email address and we will provide you with a satisfactory solution within 24 hours. Project name: Water quality testing; Main materials: ABS, electronic parts; Main colors: black, white; Product size: 15.2 x 3 x 1.2cm /5.98" x 1.18" x 0.47" (L * W * H); Weight: 94g / 3.32oz; Packing List: 1 x Water Test, 1 x gift box, 1 x manual.