▶ Silver dual head chest piece for adult, the membrane is sensitive for sound collecting;
▶ The small bell-like chest piece is used for auscultation of slight and low frequency sound;
▶ Considerate dual anti-chill ring design, connecting spring is embedded, ear tip is specially designed for suiting the ear structure;
▶ Material: stainless steel;
▶ Packing: simple color box or deluxe box with foam packing;
