1.PMLN4455 Audio Adapter 2.EX500,EX600,GL2000,GP328PLUS,GP338Plus, GP344,GP388,PRO5150ELITE 3.To two pins or Visar one pin ... PMLN4455 Audio Adapter for Motorola EX500,600,GL2000,GP328PLUS,GP338Plus,GP344,GP388,PRO5150ELITEAccessory Audio Adapter with 3.5mm Plug (Visar Series ... . PMLN4455 Audio Adapter for Motorola EX500,600,GL2000,GP328PLUS,GP338Plus,GP344,GP388,PRO5150ELITE