The 3M™ Littmann® CORE Digital Stethoscope is a Cardiology IV™ Stethoscope pre-assembled with the Eko CORE™ Digital Attachment, bringing together Littmann™ tradition and prestige with Eko's innovative and forward-thinking technology. And when paired with the Eko App, the device becomes even smarter — helping you check for signs of heart disease in seconds. Analog and amplified modes give you the choice of how to listen. Up to 40x sound amplification with 7 volume levels increases confidence in what you're hearing. Active noise cancellation reduces unwanted background sounds. Tunable diaphragm fits most adult and pediatric patients. Standard Access to the Eko App, included with purchase, allows for real-time visualization, wireless listening, single sound recording, and more. Used a couple times. Only reason why I am selling is because I bought the CORE 500 Stethoscope. Black Tubing and Rainbow Bell. Comes with Eko Case. Please review pictures & ask questions if indicated as ALL SALES ARE FINAL and NO REFUND/EXCHANGE is provided.