MedaSonics BF4B Ultrasound Stethoscope Bloodflow Doppller 5 MHzMedaSonics BF4B Ultrasound Stethoscope Bloodflow Doppller 5 MHz Grade B. Functional used ultrasound doppler stethoscope sourced from hospital surplus. Ideal for biomedical technicians, clinical resellers, and facilities needing a working unit. Reuse Medical is a Service Disabled Veteran Owned Small Business (SDVOSB) supplying hospital surplus equipment to biomedical techs, retailers, and healthcare facilities. Ships from Fresno, CA. Condition: Used