Feature: 1.PH tester has a sensitive electrode sensor ,It only takes a few seconds for your result to appear on screen.read accurate pH levels. 2.Ideal for household or laboratory use; Suitable for testing pH balance of drinking water, pool, aquarium, RO system, Spa, or hydroponics; Appropriate for wide range of applications 3. No more need to take care about the temperature of testing liquid, as ph meter has built in ATC automatic temperature compensation, so that it can accurately determine pH value of the sample at any temperature in a range of 0°C - 80°C 32°F - 176°F 4.Just remove the protective cap and immerse the PH meter electrode in the solution and press the button to be measured. Beats the heck out of trying to see the colors of a litmus strip. Measuring Range: 09990ppm Automatic Temperature Compensation: 0°C60°C Working Temperature: 0°C50°C Weight: 50 g Dimensions: 156mm×40mm×20mm Package List: 1 X PH Meter Water Quality Tester