K-Head Telescopic Throat Vibration Mic Headset for TK-208 TK-220 TH-D7 TH-F6K Head Binaural Telescopic Throat Vibration Mic Earpiece Headset for TK 208 TK 220 TH D7 TH F6Walkie Talkie Product description: Brand New and High Quality. 1. Type: Throat Microphone 2. Laryngeal conduction, to avoid high speed driving in the air noise 3. Fingers PTT wound fingers, finger movement can transmit signals 4. Transparent air duct to facilitate concealment, air duct transmission signal can reduce the noise 5. The coil can be resized 6.