The folks at ZVRS put together a video showing how communication for deaf and hard of hearing people has evolved since the Stone Age.
Soon, the Z5 will represent the next step—Dr. Z has been using it as a beta tester and he is in love with it!
To view the video: click the following link: Evolution-Z5
Dr. Z cares about your communication access.
Disclosure: Dr. Z (Philip W. Bravin) is associated with CSDVRS, currently its Vice-President of Business Development