Zeadio G Shape Earpiece Headset PTT for 1 PIN 3.5mm Yaesu Vertex Radio Vxf-1 Vx-351 Vx-354 Vx-410 Vx-420 Vx-427 Etc. Excellent for use in police, military, nightclubs, bars, paintball, security,restaurants, hotels, bouncer, warehouses, and noisy environments. Durable and thick cable, designed for tough environment This headset is for All Yaesu/ Vertex radios that required one pin plug