Doctors Research Group offers the medical industry an acoustic stethoscope, the DRG PureTone. All PureTone models have DRG's ENR tube technology, which acts to reduce inadvertent rubbing or patient induced artifact through the stethoscope tubing that may interrupt sensitive cardiac exams. Further included with the PureTone stethoscope is Doctors Research Group patent pending GelSeal eartips. The liquid filled eartips are designed to conform to the ear for a cushioned grip and designed to form a complete acoustic seal. This is Brand New in the box with a warranty, any questions please give us a call (800)355-2956.Click HERE for DETAILS.