As with the Cardiology III, full adult and paediatric auscultation is available through its dual head chestpiece simply by rotating the central spline to alternate between the two sides. The more compact one piece diaphragm and rim assemblies have further increased acoustic sensitivity. The binaurals have been redesigned with larger diameter ear tubes and a thicker single lumen binaural to transfer sound more effectively. The selector spline is now recessed to allow a flush fit with the binaural tube and now features a visual indicator for easy identification of the operational diaphragm.