Open/Half Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone for 1-pin 3.5mm Yaesu Vertex Radio Open/Half Face Motorcycle Bike Helmet Earpiece Headset Mic Microphone for Yaesu Vertex VX-1R 2R 3R 5R 150 160 180 Radio Security Door Supervisor 3.5mm. 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 Yeasu Vertex 1 pin 3.5mm plug. Including VX-1/1R, VX-2/2R, VX-3/3R, VX-5/5R, FT-10/10R, FT-40/40R, FT-50/50R, FT-60/60R, VX-10, VX-14, VX-17, VX-110, VX-150, VX-130, VX-131, VX- 132, VX-160, VX-180, VX-210, VX-210A, VX-210, VX-210A, VX-300, VX-400, VX-410, VX-420