Refractometer, Hand-Held, Range 0 Percent to 95 Percent, Automatic Temperature Compensation Yes, Accuracy +/-0.2 Percent PG, +/-1.0 Degrees F PG Boiling Point, +/-1.0 Degrees F PG Freeze Point, Resolution 0.002, Function Measures Propylene Glycol (PG) Freeze Point, Propylene Glycol (PG) Boiling Point, Propylene Glycol (PG) 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