The newest patent and chromeplate streamline stethoscope conformed to human engineering to be moved by fingers easily. It has the special incurved ring and underlay to collect the sound, and matches the sound transmittal system of high precision multi-frequency pellicle. It also has the Y-type sound button specialized for heart therapy series to make the sound precise and clear. The pocket suspension loop is made of double pieces of high-carbon steel, so it is beautiful, advanced, stable and firm.