This is a portable water quality tester with simple appearance design. Use it to test the water and making your drinking safer. Compact size, easy to hold and use. Clear and simple display, easy to read the result. Features - Color: Green. - Material: Plastic. - Size: Approx. 15.90X3.40X1.60cm/6.25X1.34X0.63in. - Suitable for drinking water, pools, aquariums, reverse osmosis systems, spas, hydroponic cultivation, etc. - Wide application range, fast measurement, simple operation, reliable use. - The water quality tester has a highly sensor to read accurate values. - High sensitivity probe for more accurate measurement and more practical use. - Using plastic material, and wear-resistant, long serving life. Specification - EC: Range: 0 to 10000uS/cm 10.01-19.99mS 20.1-400mS/CM. Resolution: /cm; 0. /cm. Accuracy: ±2% - Total Dissolved Solids: Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt (automatically ). Resolution: 1ppm; 0. . Accuracy: ±2% - : Range: 0.00 to 25.00%. Resolution: 0.01%. Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%). - : 1.000-1.222. - Calibration: EC: Three-point calibration is optional (1413uS 12.8 111. ). - Temperature compensation: ATC. - Operating environment: 0 to 80.0ºC (32.0-176F); <90%. - Coefficient: 0.5. - Temperature range: 0.1-80.0ºC, 32.0-176ºF. - Temperature accuracy: +0.5ºC. - Temperature resolution: 0.1ºC/ºF. - Automatic shutdown: 5 minutes. - Battery: 3 1.5V LR44 button batteries (INCLUDED). - Screen size: 28 x 17mm. - Display: Support backlight. - Battery: indicator. Package list: 1 Quality Tester