One button to switch function.Whole machine waterproof.Battary can be replaced easily.Portable design for easy carrying and storage.Quick and accurate test.Large and clear screen to view the value.Real-time display the remaining battery power.7 in 1 is the latest multifunctional water quality tester with 7 functions and one product, which can be used multiple times. It can measure PHTDSECORPspecifictemperature of sea water. The measurement range is large and wide, and can measure fresh water salinity and sea salt. It is suitable for digital water quality monitor in home, swimming pool, drinking water and aquarium.Function parameter:1. EC:Range: 0-10000uscm, 10.01- 19.99mScm, 20.1400.0mScm (automatic range conversion) Resolution: 1uScm; 0.1mscm;Accuracy: 2%2. TDS:Range: 0-10000ppm, 10.1-20.0ppt (automatic size conversion)Resolution: 1ppm; 0.1 point Accuracy: 2%3. Salinity:Range: 0-10000ppm, 10.1-200.0ppt, 0.01%-25.00%Resolution: 1ppm; 0.1ppt; 0.01%Accuracy: 2% 0.01-5.00% (0.1%): 5.1-25.0% (1%)4. pH valueRange: 0.01-14.00HResolution: 0.01pHAccuracy: 0.054. ORP:Range: 999mvResolution: 1mvAccuracy: 2mv5. SG:1.000-1.222Product Specifications:Waterproof grade: IP67Temperature: ATC 0-60Working environment: 0-60.0C (32.0-140F); relative humidityTDS factor: 0.5Temperature range: 0.1-60.0 32.0-140Temperature accuracy: 0.5Temperature Resolution: 0.1CFAutomatic shutdown: 5 minutesDisplay mode: LCD digital display backlightNote: Please clean the electrodes after useBatteries: 3 * 1.5V (LR44)Colour:white+blueMaterial:ABSPackage Contents:1 x Water Quality TesterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +- 1-3cm.