AV-JEFE TR-15 Throat Transdermal Microphone for Speech Difficulties Impaired compatible w Voice Amplifier Best to help users with a weak voice or minor throat problem such as: diminished lung capacity, damaged or partially paralyzed vocal cords, impairment of throat or chest muscles Please be informed that this mic is NOT designed for normal speech applications. Allows user to transmit voice signals in noisy or windy environments. Flexible for wearing on the throat/neck. Low profile look. Can also be used for surveillance purposes. Absorbs vibrations directly from the wearers throat. Requires a firm fit to operate properly. Sounds naturally generated in the nasal cavity and by the tongue and lips are muffled. The clarity can be affected by the amount of adipose tissue and facial hair on the users neck.