RA Bock Single Head Cardiology Stethoscope with Pressure Sensitive Diaphragmfeatures : 
- Unique design that combines the acoustic response of a traditional bell and diaphragm into a convenient one-sided chestpiece.
- Bell-type low frequency response is achieved by simply holding the chestpiece in place with light pressure
- Firm pressure will produce diaphragm-type high frequency performance A rubber gasket recessed into the chestpiece alters the diaphragm permitting the scope to achieve multi-frequency response
- Two tubes are incorporated into a single-tube design that eliminates noise artifacts created from two tubes rubbing together.
- All I can say is prove it to yourself with your own double blind study! not to mention Lifetime Warranty!
description : This is another really good stethoscope value. I have been using my Littman Master Cardiology for many years as an ER Physician. It has been an excellent stethoscope but honestly I can not tell any difference when listening to heart and lung sounds between this model and my Littman. Maybe after 25 years of listening through stethoscopes my ears aren't what they used to be but I sure could not tell any difference. IMHO there is no reason you need to pay 0 just for a name especially since we are so confident in the quality of this model we back it with a lifetime warranty instead of Littman's standard 7 year. All I can say is prove it to yourself with your own double blind study. Just close your eyes and let someone hand you one stethoscope or the other and see if you can pick out which stethoscope is which. We offer a 30 day no questions asked money back guarantee......... Now for the technical stuff.......The RA Bock Single Head Cardiology Stethoscope uses a single-sided ches t piece
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