Digital Refractometer, Hand-Held, Range 0 Percent to 95 Percent, Automatic Temperature Compensation Yes, Accuracy +/-0.2, Resolution 0.1, Function Measures Ethylene Glycol (EG) Freeze Point, Ethylene Glycol (EG) Boiling Point, Ethylene Glycol (EG) Percent Concentration, Length 3 29/32 in, Width 2 7/64 in, Height 1.1094 in, Includes (2) AAA Batteries, Holster Case, Manufacturers Warranty Length 1 yr