Ear-Vibration Earbone Earpiece Headset Large PTT for Motorola Two Way Radio Walkie Talkie 2pin 2 pin Ear-Vibration Earbone Earpiece Earphone Headset Large PTT(Push To Talk) for Motorola Radio Security Door Supervisor 2pin Clip this hands free earpiece onto your shirt and begin using your motorola 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.