ECHO Stethoscope. Very First Retractable Stethoscope

More length, Clip-On Modern Design and Customizable to Make it Unique for Your Personality

Retractable to make it portable enough to carry with you inside and outside of the hospital.


Planned Goals

We are moving forward to improve on the sound quality of the ECHO.  We have proven that we can hear heart and bowel sounds.  We are focused on improving the sound quality for the lung sounds as well.  We want to make sure that the ECHO Stethoscope is a top notice device before we release the first prototypes to be tested.  

In the next few months we will be working with two sound engineers with over 20 years' experience in the field and CU students that will assist in this development.

We have two major rapid prototyping companies that we have been working with for testing and product development.  As of right now we are talking to a few manufacturers to be ready for when we produce the first order of the ECHO Stethoscope to be released.

Thank you all that have PREORDERED and supported this project in moving forward.  You are the reason that products like this come together.  We will be sure to thank you and keep you in mind.

Do you still want to live like it is the 1850's?

Always bending over in a compromising position or draping a stethoscope around your neck swinging haphazardly or potential of being strangulated with by an aggressive patient is not a way to care for your patients.

Wouldn't it be great to be able to carry your stethoscope clipped on to your person.

Even being able to use your skills outside of the hospital when someone needs some life saving.

So why not upgrade and clip on your stethoscope with the ECHO Retractable Stethoscope and move forward from that old outdated carry around your neck stethoscope design.

“With the medical community having an increase of technology and innovation, why haven’t we changed the 160-year-old stethoscope”

Spoken by Mark Gross at the inaugural Rocky Mountain Veterans Pitch Competition Monday in Denver


Improvements to Sound Quality

We are working with two sound engineers, each with over 20 years of experience, to continue to improve the sound quality.  

Heart tones heard while testing with over 98 inches of tubing!

Blog posts

Functionality and Sound Quality

Functionality and Sound Quality

Hello All, Last week we meet up some two promising sound technicians, Doug and Jon, to see if they can help up to improve the functionality and sou...

ECHO Stethoscope Journey

  Hello fellow peers, My name is Mark V. Gross and I am the inventor of the ECHO Stethoscope, the world's first retractable stethoscope.  First, I ...

ECHO Community

We are starting to take Pre Orders on our ECHO Plastic models!!!!!!  

If any of you have any suggestions or recommendations please feel free to leave a message in the blog post or email Mark at  We hope to have this first  order out very soon.

ECHO Stethoscope LLC

1240 S. Birch Steet

Denver, CO


Get directions