Description Are you looking for a reliable and convenient water quality test tool? Do you want to make sure that your drinking water safer? If your answer is yes, this product will be a wise choice for you. This is a water quality test tool, which is made of premium material for the safe use. Features - Color: Green. - Material: Plastic. - Size: Approx. 15.90X3.40X1.60cm/ 6.25X1.34X0.63in. - Comes with a protective cap, which can serve you for a long time. - Simple and convenient function switching with clear and simple readings. - This water tester is using 5-in-1 design, which can be used for testing salinity, S.G, EC, temperature, total dissolved solids. - Widely applied in sea water, aquarium, swimming pool, etc. - Lightweight and portable, more convenient to store and carry out. Specification - EC: Range: 0 to 10000uS/cm 10.01-19.99mS 20.1-400mS/CM. Resolution: 1uS/cm; 0.1ms/cm. Accuracy: ±2% F.S. - Total Dissolved Solids: Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0ppt (automatically out of range). Resolution: 1ppm; 0.1 point. Accuracy: ±2% F.S. - Salinity: Range: 0.00 to 25.00%. Resolution: 0.01%. Accuracy: 0.01-5.00% (±0.1%) 5.10-25.00% (±1%). - SG: 1.000-1.222. - Calibration: EC: Three-point calibration is optional (1413uS 12.88mS 111.8mS). - Temperature compensation: ATC. - Operating environment: 0 to 80.0ºC (32.0-176F);