Welch Allyn/Hillrom Professional Pediatric StethoscopeWelch Allyn Hillrom Professional Pediatric Stethoscope The Welch Allyn Professional Pediatric Stethoscope is a lightweight, durable stethoscope designed with versatility in mind. The Professional stethoscope provides medical professionals with a broad range of auscultation capabilities, from the very low pitch (20 100 Hz) of certain heart murmurs to the higher frequencies (100 500 Hz) of aortic and pulmonic insufficiencies. It features lightweight and