Pulsat Single-Wire Surveillance Mic Kit for Vertex Standard VX-231 VX-261 VX-351 VX-451 eVerge EVX-531 S47 Professional Series Kevlar Reinforced PU cable, Heavy Duty Design Quick Disconnect earphone adapter for easy upgrade Single Wire acoustic tube for left or right ear compatibility Clothing clip assembly: 360 rotation (6) Skeleton Ear inserts included (small, medium and large) left and right for easy fitting.