We Shenzhen Landhold Industry Co., Ltd are the professional earphone manufacturer of Telecommunications Accessories for two-way radio. The high intelligibility & strong noise cancellation of our Bone Conduction Earphone are on top of the world. It uses highly sensitive "Bone Vibration/Conduction Microphone" to receive the ear-bone vibration and then translates it into electric signal. It can be widely used in the communicating domain. Other durable products, such as transparent-tube earphone, Vox-control earphone, throat-mic earphone and so on are available. We also can provide R&D service according to your detail requirements. Inquire today.