-Silver dual-membrane chestpiece: the big membrane with diameter 45.5mm is sensitive for sound collecting, while the small membrane is applicable for child.
-Zinc alloy chestpiece, excellent sound conduction, little acoustic attenuation.
-Transparent dual PVC tube, well-sealed dual sound conduction channel, good resistance to ambient interference, color is optional.
-High quality rolled steel connecting spring, tightness is reasonable.
-The attached transparent multi-pocket bag includes, which has: three plastic black bells of chestpiece are applicable for auscultating from adult to neonatal embryocardia or cacophony of vas; two pair of ear tips with different hardness; two different size spare membranes.