Product Name: 7 in 1 PH/TDS/EC/ORP/Salinity/S.G/Temperature Meter C-600 Water Quality Tester for Drinking Water, AquariumsFunction Parameters: EC (Electrical Conductivity): Range: 0-10000 μS/cm, 10.01-19.99 mS/cm, 20.1-400.0 mS/cm (Convert range automatically) Resolution: 1 μS/cm; 0.1 mS/cm Accuracy: ±2% F.S. TDS (Total Dissolved Solids): Range: 0-10000 ppm, 10.1-200.0 ppt (Convert range automatically) Resolution: 1 ppm; 0.1 ppt Accuracy: ±2% F.S. Salinity: Range: 0-10000 ppm, 10.1-200.0 ppt, 0.01%-25.00% Resolution: 1 ppm; 0.1 ppt; 0.01% Accuracy: 0.01%-5.00% (±0.1%), 5.1%-25.0% (±1%) pH: Range: 0.01-14.00 pH Resolution: 0.01 pH Accuracy: ±0.05 ORP (Oxidation-Reduction Potential): Range: ±999 mV Resolution: 1 mV Accuracy: ±2 mV S.G. (Specific Gravity): Range: 1.000-1.222Product Specifications: Waterproof Level: IP67 Temperature Compensation: ATC 0-60°C Operation Environment: 0-60.0°C (32.0-140°F); RH 100% TDS Factor: 0.5 Temperature Range: 0.1-60.0°C (32.0-140°F) Temperature Accuracy: ±0.5°C Temperature Resolution: 0.1°C/°F Automatic Shut-off: 5 minutes Display: LCD digital display Backlight: Backlight optional Attention: Clean the electrode after using Battery: 4 × 1.5V (LR44) ( included) Screen Size: 33 × 24 mm Dimensions/ Weight: 183 × 37 × 37 mm (7.2 × 1.5 × 1.5 in) / 90 g (3.2 oz)