With this handheld digital TDS meter, you could verify the quality of the various water ensure that you are enjoying the best water quality. Scope of application: pure water production and drinking, electroplating liquid, boiler water, fish tank water and swimming pool water, photographic liquid, wells, deep well water, laboratory, aquaculture, food processing, home, office, teaching, ionization water, cosmetics, city government water supply, travel health care, etc. Type: Digital TDS Meter Case Material: Plastic TDS range: 0 - 9990ppm Temperature Range: 0 - 80°C/32 - 176°F Precision: ± 2% Automatic Temperature Compensation: Yes Battery: 2 x 1.5V Button Batteries(Included) Features: Data Hold, LCD Display, Lightweight, Portable Dimension: 15.5cm x 3.1cm x 2.1cm/6.10"; x 1.22"; x 0.83"; (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Digital TDS Meter(Battery Included)