abcGOODefg 2 Pin Throat Vibration Mic Acoustic Tube Headset Earpiece with PTT VOX Switch for Kenwood BaoFeng UV-5R UV-82 BF-UV5R TYT UV-5RA HYT Retevis H-777 UV-B5 UV-B6 BF-888S Hidden microphone inside PTT button, 2 pin Throat Mic Microphone Acoustic Tube Covert Earpiece Earphone Headset Finger PTT(Push To Talk) for Kenwood Pro-Talk XLS TK Radio Security Door Supervisor Two-pin standard diameter: Ear 3.5mm stereo (top pin). Mic 2.5mm stereo (bottom pin);Space of two-pin: 11mm With the best-quality transparent acoustic tube that could hardly be detected by people around you, this is also ideal for surveillance purposes and security at airports, casinos, crowd control at conventions and concerts, and other working environment requiring discreet communications. Transparent flexible acoustic sound tube. Soft plastic earbud fits snugly to ear. Specifically designed for demanding tasks in paintball / airsoft setting. It is also widely used in discreet communications Since the microphone transmits directly from your throat, it is not sensitive to the background noise. This is exceptionally ideal for usage in high ambient environment such as driving, riding motorcycles and bicycles