VEVOR Dissolved Oxygen Meter, 0.0-50.0 mg/L Measurement Range, Portable Dissolved Oxygen Tester Kit with 13.1 ft Electrode Cable, Bluetooth/USB Data Transfer, 750 Data Sets Storage, DO Meter for PondsBluetooth / USB Data TransferClear LCD DisplayIP67 Waterproof BodyExtended ElectrodeWide Range of ApplicationsNon-slip Protective SleeveTemperature Accuracy: ±32.5°F / 0.3°C,Working Environment: 32–122°F / 0–50℃, Relative Humidity < 90%,Product Color: Black,Number of Cells: 2,Pressure Compensation: 600 to 1100 hPa adjustable, default 1013 hPa,Salinity Compensation: 0.0 to 40.0g/L adjustable, default 0.0g/L,Main Unit Dimensions(L x W x H): 8.5 x 3.1 x 2.2 inch / 217 x 80 x 55 mm,Data Transfer: USB, Bluetooth,Toolbox Dimensions(L x W x H): 13.8 x 3.5 x 10.8 inch / 350 x 90 x 275 mm,Battery Capacity: 750mAh,Air Saturation Range: 0.0–500.0%,Electrode Material: Stainless Steel,Item Model Number: 9011B,Product Net Weight: 4.1 lbs / 1.85 kg (Including Accessories + Toolbox),Temperature Range: -42.8-114.8°F / 6.0-46.0℃,Dissolved Oxygen Range: 0.00–50.00mg/L,Measurement Data Storage: 750 sets,Main Unit Shell Material: ABS