Model: DO-980Dissolved oxygen range: 0.00 to 20.00mg/L or ppmResolution: 0.01mg/LDissolved oxygen accuracy: ±0.3mg/L Saturation of oxygen: 0.0 to 200.0% Accuracy: ±5.00%Temperature range: 0.0 to 50.0˚C, 32 to 122˚FTemperature accuracy: ±1˚C, ±1.8˚FTemperature compensation: 0.0 to 40.0˚C, automaticSalinity correction: 0 to 35g/LBarometric pressure correction: 450 to 850mmHg, 60.0 to 112.5kPaCalibration points: 1 or 2 Points, 100% in air or 0% in solutionMemory: 99 data sets Output: USB Communication interface Power requirements: 9V DC, using AC adapters, 220VAC, 50Hz Dimensions: 210 x 188 x 60mm