The 3M Littmann Cardiology IV Stethoscope is designed for clinicians who require outstanding acoustic performance combined with exceptional versatility. Its innovative design provides a single-piece tunable diaphragm on each side of the chestpiece. Useful in critical care and challenging environments Such as the ED, ICU, Cardiac ICU, step down unit and other dynamic locations Hear subtle changes in patient status. Diagnose and make decisions with confidence.