Professional Throat Control Headphones/throat Mic Microphone with Transparent Air Duct Finger PTT Black With air conduit,finger PTT Throat mic Microphone Throat vibration transmission, can avoid air noise in high speed finger PTT twine on the finger,finger movement can launch signal Transparent air duct Facilitate the hidden,air conduit transmission signal can Reduce the noise applicable models:Beifeng:BF-5118,BF-5118A,BF-5180,BF6200,BF6800.PuXing:PX-777,VEV-3288S,LT-6600, LT-6288,LT-6100PLUS.QuanSheng:TG-K4AT,TG-45AT,TG-46AT,TG-42AT,TG-3118,TG-6118 etc