If You Would Like An Engraving, Please Provide Your Engraving Text As A Comment. Please Note That The Engraving Text Can Contain Up To 25 Characters. The 3M Littmann Classic Iii Stethoscope Is The Latest Version Of The Stethoscope That Helps Millions Of Doctors Perform Their Best. The Classic Iii Stethoscope Offers Excellent Acoustic Sensitivity For Exceptional Performance, As Well As A Versatile Double Sided Chestpiece With Dual Frequency Diaphragm. The Classic Iii Stethoscope Is Used By Both Students And Doctors To Identify, Monitor And Analyze Sounds From The Heart, Lungs And Other Parts Of The Body. This Allows For Assessment Of Physical Condition, Patient Monitoring And Diagnosis. Adjustable Dual Frequency Membrane Technology A 3M Invention Allows Clinical Staff To Control The Membrane So That Different Frequency Ranges Are Heard. For Low Frequency Sounds, Lightly Press The Chestpiece On The Patient, For High Frequency Sounds, Increase The Contact Pressure On The Chest. This Time Saving Feature Allows The Person Being Treated To Focus More On The Patients The Cold Protection Membrane Offers Optimal Comfort To Patients.