Full Face Moto Motorcycle Bike Helmet Earpiece Headset Mic Microphone for 2-pin Icom Maxon Yaesu Vertex Radio Full 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