... ENR (Internal Noise Reduction) Tube Technology - Stainless steel springs encapsulated in Neoprene act to isolate the interal air columns from outside disturbances.

...GELseal Eartips - DRG's patent pending GELseal eartips contain a liquid that contours and configures to your personal ear canal anatomy, providing a comfortable acoustic seal.

...Anti-slip Rings - Every DRG Stethoscope comes with Anti-Slip rings which provide high friction points that create greater stability when wearing a stethoscope around your neck.