S6 is a full function portable color Doppler used for all applications. Yingren develops this system to satisfy all the basic S6Outstanding Value and Whole Capabilities S6 is a full function portable color Doppler used for all applications. Yingren develops this system to satisfy all the basic clinical applications such as Cardiology, Radiology, Obstetrics/Gynecology, Urology, etc., with the help ...