Ear-Vibration Earbone Earpiece Headset Finger PTT for Kenwood Wouxun Puxing Two Way Radio Walkie Talkie 2pin 2 pin Ear-Vibration Earbone Earpiece Earphone Headset Finger PTT(Push To Talk) for Kenwood Wouxun Puxing Radio Security Door Supervisor 2pin 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. Using highly sensitive "Vibration pick-up Microphone" to receiver and vibration caused by ear-bone and then translating the vibration into electric signal. Perfect for very loud environments and noisy situations as it removes the background noise of a normal PTT microphone. Nose reducing Ear-Bone technolog.