3-Wire Surveillance Mic, 3-Wire Surveillance kit
Three-wire surveillance kit with acoustic tube for two-way radios. 

1) With torpedo PTT and lapel microphone with removable plastic clip
2) Quick disconnect earphone adapter for easy replacement of any one component
3) Low-profile, flexible, transparent acoustic tube
4) Flexible, high-grade cable for demanding applications
5) PU and reinforced Kevlar materials