The Littmann Select is popular with emergency personnel and nurses. The tuneable diaphragm allows the user to alternate between bell and diaphragm modes by applying pressure on the chest piece.
The Littmann Lightweight II S.E. stethoscope has a unique ovoid double-sided chestpiece for better movement around blood pressure cuffs and body contours, making it ideal for listening to blood pressure, chest, bowel, abdominal, heart, lung and breath sounds.