KENMAX Air Covert Acoustic Tube Earpiece Headset PTT(Push To Talk) with built-in line mic Microphone for Bodyguard FBI Security Door Supervisor Yaesu Vertex Radio VX-231 Clip this hands free earpiece onto your shirt and begin using your radio device to communicate discretely and easily, whether you're in security, retail, or hospitality. Ideal for demanding covert security applications where sound clarity and earpiece durability are of paramount importance. Excellent for use in police, military, nightclubs, bars, paintball, security, restaurants, hotels, bouncer, warehouses, and noisy environments. Soft ear-bud makes clear sound like people talking near your ear. Compatible with Yaesu Vertex VX-231 Radio.