Function: 1. It is a multifunctional water quality tester that can test ph, tds, ec, salinity and water temperature. 2. High precision and fast response: get the test result quickly and can test PH around 0.01-14.00 pH, temperature around 0.1-60.0 32.0-140 and salinity value around 0.01-25, 00%. 3. It adopts digital backlight screen, which is more clear and convenient to read data. 4. Suitable for water sources, aquariums, hydroponics, swimming pools and other water systems. 5. Compact pen shape, lightweight for portability, you can test the water anywhere for the clearest water. Specification: Item Type: Water Quality Tester Material : ABS Electrical conductivity test range: 0-10000uS/cm 10.01-19.99ms 20.1-400mS/CM Resolution: 1uS / cm; 0.1 mS / CM Accuracy: 2% of reading Tds test range: 0-1000ppm 1000ppm-10000ppm 10.1-200.0 PPT Resolution: 1ppm; pp Accuracy: 2% of reading Salinity (salinity) measuring range: 0.01-25.00% Resolution: 0.01% Accuracy: 0.01-5.00% (0.1%) 5.10-25.00% (1%) PH test range: 0.01-14.00pH Resolution: 0.01pH Precision: 0.05pH Temperature Compensation: Automatic Temperature Compensation (ATC) Working Environment: 0-60.0 (32.00-140 ); 100% relative humidity TDS factor: 0.5 Temperature range: 0.1-60.0 32.0-140 Temperature accuracy: 0.5 Temperature resolution: 0.1 / Auto power off: 5 min Display Size: Approx. 33 x 24 mm / 1.3 x 1 inch Size: Approx. 183 x 37 x 37 mm / 7.2 x 1.5 x 1.5 inch Display: supports backlight Waterproof degree: IP67 Power consumption: 2.9 mA Power consumption when switching off: 0 Weight: approx. 160g / 5.7oz Package List: 1 x Water Quality Tester 1 x Manual Note: Remember to clean the electrodes after each use. Accuracy within 150ppt is relatively accurate, while deviation above 160ppt is relatively large. This product will be shipped without powder.