Special Features:

In-the-ear type, custom-made; consists of a microphone, transmitter, air receiver enclosed in a custom-made shell and presentation case

Properties:

A device designed especially to improve the input of the sound level for the hearing-impaired. It has switches which can adjust the sound level of the volume to provide the user's decibel needs. It contains a microphone and a transmitter, as well as a compartment for batteries. It may be worn behind the ear, as a component of eyeglasses, or placed elsewhere on the body. Excludes earphone and headset, electrical.