Designed to work with moto/bike racing helmet.</br>PTT button with velcro which can be fixed to handlebar is convenient to use.</br>Noise cancelling with boom mic microphone. Dual speakers with sticker?? can be pasted to inside of the helmet.</br>Full Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Icom Maxon Yaesu Vertex Radio Security Door Supervisor 2pin.</br>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</br></br>Product Description</br></br><p><b>AOER?? 2-pin Full Face Moto Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Icom IC-T7A/T7H IC-T22A IC-T81A IC-T90A IC-U12 IC-U16 Maxon SL55 SL70 SP14 SP100 Vertex VX500 VX510 VX520UD Radio</b></p> <b>For use with the following radios and many more that require a dual