The 612 features:

• 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 in chestpiece alters the diaphragm permitting the scope to achieve multi-frequency response
  
  
• Chestpiece made from lightweight zinc alloy plated with an attractive satin finish
  
  
• Non-chill diaphragm retaining rim for patient comfort
  
  
• Large bore chrome-plated brass binaurals in satin finish
  
  
• Double leaf internal spring fixed at 15º angle for greater comfort
  
  
• Reinforcing yoke molded into flexible 22" PVC “Y” tubing
  
  
• Adsoft™ deluxe PVC eartips in small and large size for the ultimate in wearing comfort and acoustic seal
  
  
• Spare diaphragm included
  
  
• Scope ID Tag included
  
  
• Weighs 6 oz
  
  
• Overall length 30.5"
  
  
• Lifetime Warranty