This water quality tester is well-made of for and practical use. The figures are on the digital display, easy to read and record. It is a perfect testing tool for professional and household use. Features - Color: Green. - Material: Plastic. - Size: Approx. 15.90X3.40X1.60cm/6.25X1.34X0.63in. - Perfect for gardening, aquariums, pools, spas and household use. - Equipped with three LR44 batteries, which is powered by batteries. - The digital display screen is clear enough to allow you to read easily. - The plastic protective cover can effectively protect the . - Compact and light, easy to store, not taking up any space. 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