DEFENDER MEDIUM-DUTY LAPEL MICROPHONE w/D-Shape Ear Hanger. The D ring fits over the ear to hold earpiece in securely in place. Patented swivel design can be used on either ear.
Motorola unique 1-pin that screws into jack. Used mostly with Motorola BDN6676 and HLN9717 adapters or Pryme PA-BDN6676 and PA-HLN9717 adapters.