Rugged  Microphone Design Effective Noise Canceling Excellent Voice Characteristics Dynamic Differential Microphone  Cartridge Greatly Attenuates Noises More Than 1/2" Away Centralized Lip Guard For Proper Microphone to Mouth Positioning Push To Talk Switch Located on Top of Case Equipped With 6 Conductor Thin Coiled Cord This Model Comes Unterminated Other Models Available  with Thick or Thin Cord (See RK56, RK565P, RK564B, RK56B4P, RK56B5P