1 Throat mic 2. Vibration-type sensor unit microphone 3. With pretty good anti-noise performance 4. Finger PTT Throat mic Vibration-type sensor unit microphone with pretty good ... ,GP238,GP308,GP208,GP318,HT1550,PRO5150,RPO5750,PRO5450,PRO5550...Suitable for various two way radios with changeable plug. Throat mic with acoustic tube finger PTT for Motorola GP328 two way radio