The Xpress A1c strips works as both a pipette and measuring element. A Blood drop of 8uL is needed for measurement. This blood is drawn into the cavity by capillary action. The Xpress A1c strips then needs to be inserted into Xpress A1c meter for hemoglobin measurement, The Xpress A1c meter measures the absorbance of whole blood at Hb isosbestic point. Xpress A1c meter uses two wavelengths of light to calculate Hemoglobin level, user level calibration is not required. How to use: Step 1: Wash hands using soap and warm water. Rinse and dry thoroughly. Step 2: Turn on the meter by pressing-releasing the power button. Step 3: Remove an Xpress A1c strip from the vial. Step 4: Prick a finger to obtain a blood sample. Step 5: Touch and hold the drop of blood to the pointed edge of the Xpress A1c strip. The blood is drawn into the Xpress A1c strip by capillary action Step 6: Once the blood fills the Xpress A1c strip chamber. Insert the Xpress A1c strip into the Xpress A1c meter. Step 7: Your Hemoglobin result will appear on the display window. Step 8: Remove the Xpress A1c strip from the meter and discard it. The meter will automatically turn off or long-press the power button to turn off.