Open/Half Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Icom Maxon Yaesu Vertex Radio Security Door Supervisor 2pin.;Designed to work with moto/bike racing helmet.;Noise cancelling with boom mic microphone. Dual speakers with sticker， can be pasted to inside of the helmet.;PTT button with velcro which can be fixed to handlebar is convenient to use.;Compatible with two way radios walkie talkie that required Icom 2-Pin plug. Including Icom IC-F3， IC-F3S， IC-F4， IC-F4S， IC-F4SR， IC-F4TR， IC-F10， IC-F20， IC-H2， IC-H6， IC-J12， IC-M5， IC-T7A/T7H， IC-T22A， IC-T81A， IC-T90A， IC-U12， IC- U16， IC-V8， IC-W32A， IC-4088A， Maxon SL25， SL55， SL70， SP14， SP100， SP120， SP130， SP140， SP210， 500 series， 5000 series， Vertex VX200， VX500， VX510， VX520UD