Specification:Condition: 100% Brand NewItem Type: Water Quality TesterMaterial: PlasticEC Test Range: 0 to10000uS/cm 10.01-19.99ms 20.1-400mS/CMResolution: 1uS/cm; 0.1mS/CMAccuracy: 2% of the readingTDS Test Range: 0 to 1000ppm 1000ppm to 10000ppm 10.1 to 200.0pptResolution: 1ppm; 0.1pptAccuracy: 2% of the readingSalinity Test Range: 0.00 to 25.00%Resolution: 0.01%Accuracy: 0.01-5.00% (0.1%) 5.10-25.00% (1%)pH Test Range: 0.01-14.00pHResolution: 0.01pHAccuracy: 0.05pHTemperature Compensation: Automatic Temperature Compensation (ATC)Working Environment: 0 to 60.0 (32.0-140); RH 100%TDS Factor: 0.4 to 1.0Temperature Range: 0.1-60.0 32.0-140Temperature Accuracy: 0.5Temperature Resolution: 0.1/Automatic Power-off: 5 MinutesDisplay: Support BacklightWaterproof Grade: IP67Power Consumption: 2.9mA, power consumption for shutdown is 0Feature: Within 150ppt, the accuracy is relatively accurate, while above 160ppt, the deviation is relatively largeBattery: 3 x LR44 Button Battery (Not Included)Display Screen Size: Approx. 33 x 24 mm / 1.3 x 0.9 inProduct Size: Approx. 183 x 37 x 37 mm / 7.2 x 1.5 x 1.5 inWeight: Approx. 162g / 5.7ozPackage List:1 x Water Quality Tester (Battery Not Included)1 x User Manual