The Littmann Classic II SE is the most popular stethoscope purchased by nursing students. It features the traditional bell and diaphragm style used by nurses to take blood pressure and listen to heart and lung sounds. In late 2014, Littmann introduced the Classic III as the next generation nursing stethoscope. It includes one piece diaphragms for better sound quality on adult and pediatric patients. The Cardiology IV has two tube in one design to provide better acoustics for listening to heart and lung sounds. This would be an excellent upgrade for a Nurse Practitioner. The Prestige Clinical I and Cardiology are economy versions of the Classic II SE and Cardiology IV, respectively. They provide similar acoustic ability at an economical price.