"The MAGNUM_MEDIA CLINICAL REFRACTOMETER" is a Triple Scale, professional Clinical Refractometer for the measuring of Urine Specific Gravity, Urine Refractive Index and Blood Serum Protein.Ideal for testing Animals and peoples hydration through the Urine Specific Gravity readings.Veterinarians can use the unit for testing the hydration of all sorts of animals - from small to big. Of note, there is a more accurate Refractometer for measuring Cats and Dogs - please look for our "Cat and Dog Refractometer" through Amazon.Parole Officers can use this unit for on the spot testing of basic hydration which can be helpful for drug testing.Comes in a case with a calibration screwdriver, pipette, and users guide. Calibrate with distilled water as water will equal 0g/dl, 1.000 Urine SG and 1.330 Urine RI.Comes with a 5 year warranty against manufacturers defects.NO ONE ELSE IN THE WORLD HAS THIS UNIT! IF YOU SEE ANOTHER SELLER SELLING IT, IT IS A FAKE! PLEASE REPORT THEM TO AMAZON AND TO US FOR PROSECUTION!