1Water quality tester has a sensitive probe, can avoid interference, reduce the magnetic field in the water, and reduce errors. 2The instrument has 4 different modes, press SHIFT key to switch between different modes. 3Widely used in drinking water, aquarium, fish tanks, swimming pools, farmland irrigation, laboratories. 4Compact and portable pen type design,easy to operate and storage, convenient to carry. 5The large LCD screen, TDS, EC temperature display is clear, easy to read. Condition: 100% Brand New Item Type: Water Quality Tester Material: ABS Color: Blue Size: Approx.154x30x14mm/6.1x1.2x0.6in Weight: Approx.65g/2.3oz Application: Swimming pool, water plant laboratory, aquaculture industry Measurement Accuracy: 0.1 Resolution: 0.1 Measuring Range: 0-9990us/cm Battery: 1 x CR2032 button battery 120MAH(Not included) 1 x Water Quality Tester(Battery Not Included) 1 x Storage Bag 1 x Instruction Manual