Produced with advanced acoustic system technology, the Welch Allyn stethoscope filters out unwanted sounds and provides a clear sense of hearing. The earphone part of the product, which is extremely light, is designed in accordance with ear ergonomics. Therefore, it does not cause any discomfort during long-term use. 2 spare diaphragm ear olives are included in the product. Double-sided It has a diaphragm feature.