Portable Battery Coolant Refractometer, Coolant/Battery Acid, Range Ethylene Glycol Freeze Point: -60 Degrees F (59 Percent) to 25 Degrees F (16 Percent), Propylene Glycol Freeze Point: -60 Degrees F (63 Percent) to 32 Degrees F (12 Percent), Specific Gravity of Battery Acid: 1.15 to 1.30, Automatic Temperature Compensation Yes, Accuracy +/-2 Percent, Resolution Glycol: 2 Degrees F, Specific Gravity: 0.01 Item Portable Battery Coolant Refractometer Type Coolant/Battery Acid Accuracy +/-2% Includes Calibration Screwdriver, Calibration Solution, Carrying Case, Plastic Pipette Range Ethylene Glycol Freeze Point: -60 Degrees F (59%) to 25 Degrees F (16%), Propylene Glycol Freeze Point: -60 Degrees F (63%) to 32 Degrees F (12%), Specific Gravity of Battery Acid: 1.15 to 1.30 Automatic Temperature Compensation Yes Features Requires Only 2 or 3 Drops of Solution Resolution Glycol: 2 Degrees F, Specific Gravity: 0.01 Function Measures the Freezing Point of Automotive Coolants (Propylene Glycol and Ethylene Glycol) and Indicates the Specific Gravity of Battery Acid and Provides A Quick Reference of Battery Charge Condition Freezing Point Ethylene Glycol Freeze Point: -60 Degrees F (59%) to 25 Degrees F (16%), Propylene Glycol Freeze Point: -60 Degrees F (63%) to 32 Degrees F (12%) Specific Gravity 1.15 to 1.30 (Battery Acid) Product Type Portable Battery Coolant Refractometer Package Quantity 1