Clarity CLA-HB4 HbCheck Hemoglobin Controls provide a liquid quality control solution designed to verify the performance accuracy and calibration integrity of the Clarity HbCheck Hemoglobin Testing System. Formulated into three distinct concentration levels (Solution 0, Solution 1, and Solution 2), this tri-level control set enables clinical laboratories and healthcare facilities to validate instrument accuracy across low, normal, and elevated hemoglobin analytical measurement ranges. Supplied in convenient 2 mL dropper vials, these controls support routine laboratory quality assurance compliance in physician office laboratories, urgent care centers, mobile clinics, and outpatient diagnostic settings