1 cm Sound Head Applicator Cuff Weights Racks Adaptive Feedback Cancellation (AFC) The Hearing Aid Adaptive Feedback Cancellation (AFC) The whistle (feedback) will be reduced by this function when you use the device Special Edition: Black Binaural Black Tubing Black Chestpiece 27 * The ultimate acoustical stethoscope * Tunable diaphragm conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Handcrafted sold stainless steel chestpiece * 2 in 1 tube design eliminates tube rubbing noise * Portable convenience of a single sided chestpiece * Excellent acoustic seal and comfortable fit with patented Littmann Snap Tight soft sealing eartips * Comfortably angled anatomically correct headset * Patient friendly nonchill rim and diaphragm 1 cm2 Sound Head Applicator * Optional Accessorie for the following items: CHAT2782 CHAT2738K CHAT2763 CHAT2786K CHAT2760K CHAT2788K CHAT2793K CHAT2797K CHAT2791K CHAT2795K *