Accurate And Reliable: To achieve high accuracy equipped with premium quality titanium alloy probe and reliable Automatic Temperature Compensation (ATC) ensures reading always be accurate at various temperatures. Its a must have handy hard water tool test for every household testing for pond water tap water filtered water distilled water bottled water well water refrigerated water and water hardness test etc. Easy And Instantly: Just turn TDS meter on and stir water gently then stabilized readings will be auto-locked on LCD in seconds and the tds ppm meter will shut off automatically if without operation over 5 minutes. Multipurpose TDS Tester: Test drinking water purity to ensure it s healthy monitor if Reverse Osmosis (RO)/DI System works properly whether filter need replaced maintenance aquarium hydroponics(test nutrients) pool and spa etc. Item Name: Water Quality Test; Main Material: ABS Eletronic Parts;nbsp; Main Color: Black White;nbsp; Item Size: 15.2 x 3 x 1.2cm / 5.98 x 1.18 x 0.47 (L * W * H);nbsp; Weight: 94g / 3.32oz;nbsp; Package Include: 1 x Water Quality Test 1 x Gift Box 1 x Manual.